Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4bbbc1ad JY |
2 | /* |
3 | * GPMC support functions | |
4 | * | |
5 | * Copyright (C) 2005-2006 Nokia Corporation | |
6 | * | |
7 | * Author: Juha Yrjola | |
8 | * | |
44169075 SS |
9 | * Copyright (C) 2009 Texas Instruments |
10 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> | |
4bbbc1ad | 11 | */ |
77ed5e9d | 12 | #include <linux/cpu_pm.h> |
db97eb7d | 13 | #include <linux/irq.h> |
4bbbc1ad | 14 | #include <linux/kernel.h> |
854fd920 | 15 | #include <linux/module.h> |
4bbbc1ad JY |
16 | #include <linux/init.h> |
17 | #include <linux/err.h> | |
18 | #include <linux/clk.h> | |
f37e4580 ID |
19 | #include <linux/ioport.h> |
20 | #include <linux/spinlock.h> | |
fced80c7 | 21 | #include <linux/io.h> |
d2d00862 | 22 | #include <linux/gpio/driver.h> |
a0752e9c | 23 | #include <linux/gpio/consumer.h> /* GPIO descriptor enum */ |
5923ea6c | 24 | #include <linux/gpio/machine.h> |
db97eb7d | 25 | #include <linux/interrupt.h> |
384258f2 | 26 | #include <linux/irqdomain.h> |
da496873 | 27 | #include <linux/platform_device.h> |
bc6b1e7b | 28 | #include <linux/of.h> |
cdd6928c | 29 | #include <linux/of_address.h> |
bc6b1e7b | 30 | #include <linux/of_device.h> |
b1dc1ca9 | 31 | #include <linux/of_platform.h> |
e639cd5b | 32 | #include <linux/omap-gpmc.h> |
b3f5525c | 33 | #include <linux/pm_runtime.h> |
07852c3f | 34 | #include <linux/sizes.h> |
4bbbc1ad | 35 | |
bc3668ea | 36 | #include <linux/platform_data/mtd-nand-omap2.h> |
4bbbc1ad | 37 | |
4be48fd5 AM |
38 | #define DEVICE_NAME "omap-gpmc" |
39 | ||
fd1dc87d | 40 | /* GPMC register offsets */ |
4bbbc1ad JY |
41 | #define GPMC_REVISION 0x00 |
42 | #define GPMC_SYSCONFIG 0x10 | |
43 | #define GPMC_SYSSTATUS 0x14 | |
44 | #define GPMC_IRQSTATUS 0x18 | |
45 | #define GPMC_IRQENABLE 0x1c | |
46 | #define GPMC_TIMEOUT_CONTROL 0x40 | |
47 | #define GPMC_ERR_ADDRESS 0x44 | |
48 | #define GPMC_ERR_TYPE 0x48 | |
49 | #define GPMC_CONFIG 0x50 | |
50 | #define GPMC_STATUS 0x54 | |
51 | #define GPMC_PREFETCH_CONFIG1 0x1e0 | |
52 | #define GPMC_PREFETCH_CONFIG2 0x1e4 | |
15e02a3b | 53 | #define GPMC_PREFETCH_CONTROL 0x1ec |
4bbbc1ad JY |
54 | #define GPMC_PREFETCH_STATUS 0x1f0 |
55 | #define GPMC_ECC_CONFIG 0x1f4 | |
56 | #define GPMC_ECC_CONTROL 0x1f8 | |
57 | #define GPMC_ECC_SIZE_CONFIG 0x1fc | |
948d38e7 | 58 | #define GPMC_ECC1_RESULT 0x200 |
8d602cf5 | 59 | #define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */ |
2fdf0c98 AM |
60 | #define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */ |
61 | #define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */ | |
62 | #define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */ | |
27c9fd60 | 63 | #define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */ |
64 | #define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */ | |
65 | #define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */ | |
4bbbc1ad | 66 | |
2c65e744 YY |
67 | /* GPMC ECC control settings */ |
68 | #define GPMC_ECC_CTRL_ECCCLEAR 0x100 | |
69 | #define GPMC_ECC_CTRL_ECCDISABLE 0x000 | |
70 | #define GPMC_ECC_CTRL_ECCREG1 0x001 | |
71 | #define GPMC_ECC_CTRL_ECCREG2 0x002 | |
72 | #define GPMC_ECC_CTRL_ECCREG3 0x003 | |
73 | #define GPMC_ECC_CTRL_ECCREG4 0x004 | |
74 | #define GPMC_ECC_CTRL_ECCREG5 0x005 | |
75 | #define GPMC_ECC_CTRL_ECCREG6 0x006 | |
76 | #define GPMC_ECC_CTRL_ECCREG7 0x007 | |
77 | #define GPMC_ECC_CTRL_ECCREG8 0x008 | |
78 | #define GPMC_ECC_CTRL_ECCREG9 0x009 | |
79 | ||
e378d22b RQ |
80 | #define GPMC_CONFIG_LIMITEDADDRESS BIT(1) |
81 | ||
512d73d1 RQ |
82 | #define GPMC_STATUS_EMPTYWRITEBUFFERSTATUS BIT(0) |
83 | ||
559d94b0 AM |
84 | #define GPMC_CONFIG2_CSEXTRADELAY BIT(7) |
85 | #define GPMC_CONFIG3_ADVEXTRADELAY BIT(7) | |
86 | #define GPMC_CONFIG4_OEEXTRADELAY BIT(7) | |
87 | #define GPMC_CONFIG4_WEEXTRADELAY BIT(23) | |
88 | #define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6) | |
89 | #define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7) | |
90 | ||
948d38e7 | 91 | #define GPMC_CS0_OFFSET 0x60 |
4bbbc1ad | 92 | #define GPMC_CS_SIZE 0x30 |
2fdf0c98 | 93 | #define GPMC_BCH_SIZE 0x10 |
4bbbc1ad | 94 | |
bdd7e033 RQ |
95 | /* |
96 | * The first 1MB of GPMC address space is typically mapped to | |
97 | * the internal ROM. Never allocate the first page, to | |
98 | * facilitate bug detection; even if we didn't boot from ROM. | |
99 | * As GPMC minimum partition size is 16MB we can only start from | |
100 | * there. | |
101 | */ | |
102 | #define GPMC_MEM_START 0x1000000 | |
f37e4580 | 103 | #define GPMC_MEM_END 0x3FFFFFFF |
f37e4580 ID |
104 | |
105 | #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ | |
106 | #define GPMC_SECTION_SHIFT 28 /* 128 MB */ | |
107 | ||
59e9c5ae | 108 | #define CS_NUM_SHIFT 24 |
109 | #define ENABLE_PREFETCH (0x1 << 7) | |
110 | #define DMA_MPU_MODE 2 | |
111 | ||
98397f1c KK |
112 | #define GPMC_REVISION_MAJOR(l) (((l) >> 4) & 0xf) |
113 | #define GPMC_REVISION_MINOR(l) ((l) & 0xf) | |
da496873 AM |
114 | |
115 | #define GPMC_HAS_WR_ACCESS 0x1 | |
116 | #define GPMC_HAS_WR_DATA_MUX_BUS 0x2 | |
aa8d4767 | 117 | #define GPMC_HAS_MUX_AAD 0x4 |
da496873 | 118 | |
9f833156 JH |
119 | #define GPMC_NR_WAITPINS 4 |
120 | ||
e639cd5b TL |
121 | #define GPMC_CS_CONFIG1 0x00 |
122 | #define GPMC_CS_CONFIG2 0x04 | |
123 | #define GPMC_CS_CONFIG3 0x08 | |
124 | #define GPMC_CS_CONFIG4 0x0c | |
125 | #define GPMC_CS_CONFIG5 0x10 | |
126 | #define GPMC_CS_CONFIG6 0x14 | |
127 | #define GPMC_CS_CONFIG7 0x18 | |
128 | #define GPMC_CS_NAND_COMMAND 0x1c | |
129 | #define GPMC_CS_NAND_ADDRESS 0x20 | |
130 | #define GPMC_CS_NAND_DATA 0x24 | |
131 | ||
132 | /* Control Commands */ | |
133 | #define GPMC_CONFIG_RDY_BSY 0x00000001 | |
134 | #define GPMC_CONFIG_DEV_SIZE 0x00000002 | |
135 | #define GPMC_CONFIG_DEV_TYPE 0x00000003 | |
e639cd5b | 136 | |
89aed3cd | 137 | #define GPMC_CONFIG_WAITPINPOLARITY(pin) (BIT(pin) << 8) |
e639cd5b TL |
138 | #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31) |
139 | #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30) | |
140 | #define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29) | |
141 | #define GPMC_CONFIG1_READTYPE_SYNC (1 << 29) | |
142 | #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28) | |
143 | #define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27) | |
144 | #define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27) | |
98397f1c | 145 | #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) (((val) & 3) << 25) |
4b613e9b RA |
146 | /** CLKACTIVATIONTIME Max Ticks */ |
147 | #define GPMC_CONFIG1_CLKACTIVATIONTIME_MAX 2 | |
98397f1c | 148 | #define GPMC_CONFIG1_PAGE_LEN(val) (((val) & 3) << 23) |
4b613e9b RA |
149 | /** ATTACHEDDEVICEPAGELENGTH Max Value */ |
150 | #define GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX 2 | |
e639cd5b TL |
151 | #define GPMC_CONFIG1_WAIT_READ_MON (1 << 22) |
152 | #define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21) | |
98397f1c | 153 | #define GPMC_CONFIG1_WAIT_MON_TIME(val) (((val) & 3) << 18) |
2e676901 RA |
154 | /** WAITMONITORINGTIME Max Ticks */ |
155 | #define GPMC_CONFIG1_WAITMONITORINGTIME_MAX 2 | |
98397f1c KK |
156 | #define GPMC_CONFIG1_WAIT_PIN_SEL(val) (((val) & 3) << 16) |
157 | #define GPMC_CONFIG1_DEVICESIZE(val) (((val) & 3) << 12) | |
e639cd5b | 158 | #define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1) |
4b613e9b RA |
159 | /** DEVICESIZE Max Value */ |
160 | #define GPMC_CONFIG1_DEVICESIZE_MAX 1 | |
98397f1c | 161 | #define GPMC_CONFIG1_DEVICETYPE(val) (((val) & 3) << 10) |
e639cd5b | 162 | #define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0) |
98397f1c | 163 | #define GPMC_CONFIG1_MUXTYPE(val) (((val) & 3) << 8) |
e639cd5b | 164 | #define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4) |
98397f1c | 165 | #define GPMC_CONFIG1_FCLK_DIV(val) ((val) & 3) |
e639cd5b TL |
166 | #define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1)) |
167 | #define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2)) | |
168 | #define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3)) | |
169 | #define GPMC_CONFIG7_CSVALID (1 << 6) | |
170 | ||
9c4f757e SP |
171 | #define GPMC_CONFIG7_BASEADDRESS_MASK 0x3f |
172 | #define GPMC_CONFIG7_CSVALID_MASK BIT(6) | |
173 | #define GPMC_CONFIG7_MASKADDRESS_OFFSET 8 | |
174 | #define GPMC_CONFIG7_MASKADDRESS_MASK (0xf << GPMC_CONFIG7_MASKADDRESS_OFFSET) | |
175 | /* All CONFIG7 bits except reserved bits */ | |
176 | #define GPMC_CONFIG7_MASK (GPMC_CONFIG7_BASEADDRESS_MASK | \ | |
177 | GPMC_CONFIG7_CSVALID_MASK | \ | |
178 | GPMC_CONFIG7_MASKADDRESS_MASK) | |
179 | ||
e639cd5b TL |
180 | #define GPMC_DEVICETYPE_NOR 0 |
181 | #define GPMC_DEVICETYPE_NAND 2 | |
182 | #define GPMC_CONFIG_WRITEPROTECT 0x00000010 | |
183 | #define WR_RD_PIN_MONITORING 0x00600000 | |
184 | ||
e639cd5b TL |
185 | /* ECC commands */ |
186 | #define GPMC_ECC_READ 0 /* Reset Hardware ECC for read */ | |
187 | #define GPMC_ECC_WRITE 1 /* Reset Hardware ECC for write */ | |
188 | #define GPMC_ECC_READSYN 2 /* Reset before syndrom is read back */ | |
189 | ||
b2bac25a | 190 | #define GPMC_NR_NAND_IRQS 2 /* number of NAND specific IRQs */ |
6b6c32fc | 191 | |
7f2e8c58 RA |
192 | enum gpmc_clk_domain { |
193 | GPMC_CD_FCLK, | |
194 | GPMC_CD_CLK | |
195 | }; | |
196 | ||
9ed7a776 TL |
197 | struct gpmc_cs_data { |
198 | const char *name; | |
199 | ||
200 | #define GPMC_CS_RESERVED (1 << 0) | |
201 | u32 flags; | |
202 | ||
203 | struct resource mem; | |
204 | }; | |
205 | ||
a2d3e7ba RN |
206 | /* Structure to save gpmc cs context */ |
207 | struct gpmc_cs_config { | |
208 | u32 config1; | |
209 | u32 config2; | |
210 | u32 config3; | |
211 | u32 config4; | |
212 | u32 config5; | |
213 | u32 config6; | |
214 | u32 config7; | |
215 | int is_valid; | |
216 | }; | |
217 | ||
218 | /* | |
219 | * Structure to save/restore gpmc context | |
220 | * to support core off on OMAP3 | |
221 | */ | |
222 | struct omap3_gpmc_regs { | |
223 | u32 sysconfig; | |
224 | u32 irqenable; | |
225 | u32 timeout_ctrl; | |
226 | u32 config; | |
227 | u32 prefetch_config1; | |
228 | u32 prefetch_config2; | |
229 | u32 prefetch_control; | |
230 | struct gpmc_cs_config cs_context[GPMC_CS_NUM]; | |
231 | }; | |
232 | ||
89aed3cd BN |
233 | struct gpmc_waitpin { |
234 | u32 pin; | |
235 | u32 polarity; | |
236 | struct gpio_desc *desc; | |
237 | }; | |
238 | ||
384258f2 RQ |
239 | struct gpmc_device { |
240 | struct device *dev; | |
241 | int irq; | |
242 | struct irq_chip irq_chip; | |
d2d00862 | 243 | struct gpio_chip gpio_chip; |
77ed5e9d TL |
244 | struct notifier_block nb; |
245 | struct omap3_gpmc_regs context; | |
89aed3cd | 246 | struct gpmc_waitpin *waitpins; |
b2bac25a | 247 | int nirqs; |
77ed5e9d | 248 | unsigned int is_suspended:1; |
7e58accf | 249 | struct resource *data; |
384258f2 RQ |
250 | }; |
251 | ||
252 | static struct irq_domain *gpmc_irq_domain; | |
6b6c32fc | 253 | |
f37e4580 | 254 | static struct resource gpmc_mem_root; |
9ed7a776 | 255 | static struct gpmc_cs_data gpmc_cs[GPMC_CS_NUM]; |
87b247c4 | 256 | static DEFINE_SPINLOCK(gpmc_mem_lock); |
6797b4fe | 257 | /* Define chip-selects as reserved by default until probe completes */ |
f34f3716 | 258 | static unsigned int gpmc_cs_num = GPMC_CS_NUM; |
9f833156 | 259 | static unsigned int gpmc_nr_waitpins; |
1cd53458 | 260 | static unsigned int gpmc_capability; |
fd1dc87d | 261 | static void __iomem *gpmc_base; |
4bbbc1ad | 262 | |
fd1dc87d | 263 | static struct clk *gpmc_l3_clk; |
4bbbc1ad | 264 | |
db97eb7d SG |
265 | static irqreturn_t gpmc_handle_irq(int irq, void *dev); |
266 | ||
4bbbc1ad JY |
267 | static void gpmc_write_reg(int idx, u32 val) |
268 | { | |
edfaf05c | 269 | writel_relaxed(val, gpmc_base + idx); |
4bbbc1ad JY |
270 | } |
271 | ||
272 | static u32 gpmc_read_reg(int idx) | |
273 | { | |
edfaf05c | 274 | return readl_relaxed(gpmc_base + idx); |
4bbbc1ad JY |
275 | } |
276 | ||
277 | void gpmc_cs_write_reg(int cs, int idx, u32 val) | |
278 | { | |
279 | void __iomem *reg_addr; | |
280 | ||
948d38e7 | 281 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 282 | writel_relaxed(val, reg_addr); |
4bbbc1ad JY |
283 | } |
284 | ||
3fc089e7 | 285 | static u32 gpmc_cs_read_reg(int cs, int idx) |
4bbbc1ad | 286 | { |
fd1dc87d PW |
287 | void __iomem *reg_addr; |
288 | ||
948d38e7 | 289 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 290 | return readl_relaxed(reg_addr); |
4bbbc1ad JY |
291 | } |
292 | ||
fd1dc87d | 293 | /* TODO: Add support for gpmc_fck to clock framework and use it */ |
3fc089e7 | 294 | static unsigned long gpmc_get_fclk_period(void) |
4bbbc1ad | 295 | { |
fd1dc87d PW |
296 | unsigned long rate = clk_get_rate(gpmc_l3_clk); |
297 | ||
fd1dc87d PW |
298 | rate /= 1000; |
299 | rate = 1000000000 / rate; /* In picoseconds */ | |
300 | ||
301 | return rate; | |
4bbbc1ad JY |
302 | } |
303 | ||
7f2e8c58 RA |
304 | /** |
305 | * gpmc_get_clk_period - get period of selected clock domain in ps | |
80c4f5a8 KK |
306 | * @cs: Chip Select Region. |
307 | * @cd: Clock Domain. | |
7f2e8c58 RA |
308 | * |
309 | * GPMC_CS_CONFIG1 GPMCFCLKDIVIDER for cs has to be setup | |
310 | * prior to calling this function with GPMC_CD_CLK. | |
311 | */ | |
312 | static unsigned long gpmc_get_clk_period(int cs, enum gpmc_clk_domain cd) | |
313 | { | |
7f2e8c58 RA |
314 | unsigned long tick_ps = gpmc_get_fclk_period(); |
315 | u32 l; | |
316 | int div; | |
317 | ||
318 | switch (cd) { | |
319 | case GPMC_CD_CLK: | |
320 | /* get current clk divider */ | |
321 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); | |
322 | div = (l & 0x03) + 1; | |
323 | /* get GPMC_CLK period */ | |
324 | tick_ps *= div; | |
325 | break; | |
326 | case GPMC_CD_FCLK: | |
7f2e8c58 RA |
327 | default: |
328 | break; | |
329 | } | |
330 | ||
331 | return tick_ps; | |
7f2e8c58 RA |
332 | } |
333 | ||
334 | static unsigned int gpmc_ns_to_clk_ticks(unsigned int time_ns, int cs, | |
335 | enum gpmc_clk_domain cd) | |
4bbbc1ad JY |
336 | { |
337 | unsigned long tick_ps; | |
338 | ||
339 | /* Calculate in picosecs to yield more exact results */ | |
7f2e8c58 | 340 | tick_ps = gpmc_get_clk_period(cs, cd); |
4bbbc1ad JY |
341 | |
342 | return (time_ns * 1000 + tick_ps - 1) / tick_ps; | |
343 | } | |
344 | ||
7f2e8c58 RA |
345 | static unsigned int gpmc_ns_to_ticks(unsigned int time_ns) |
346 | { | |
347 | return gpmc_ns_to_clk_ticks(time_ns, /* any CS */ 0, GPMC_CD_FCLK); | |
348 | } | |
349 | ||
3fc089e7 | 350 | static unsigned int gpmc_ps_to_ticks(unsigned int time_ps) |
a3551f5b AH |
351 | { |
352 | unsigned long tick_ps; | |
353 | ||
354 | /* Calculate in picosecs to yield more exact results */ | |
355 | tick_ps = gpmc_get_fclk_period(); | |
356 | ||
357 | return (time_ps + tick_ps - 1) / tick_ps; | |
358 | } | |
359 | ||
3950fffd BX |
360 | static unsigned int gpmc_clk_ticks_to_ns(unsigned int ticks, int cs, |
361 | enum gpmc_clk_domain cd) | |
7f2e8c58 RA |
362 | { |
363 | return ticks * gpmc_get_clk_period(cs, cd) / 1000; | |
364 | } | |
365 | ||
fd1dc87d PW |
366 | unsigned int gpmc_ticks_to_ns(unsigned int ticks) |
367 | { | |
7f2e8c58 | 368 | return gpmc_clk_ticks_to_ns(ticks, /* any CS */ 0, GPMC_CD_FCLK); |
fd1dc87d PW |
369 | } |
370 | ||
246da26d AM |
371 | static unsigned int gpmc_ticks_to_ps(unsigned int ticks) |
372 | { | |
373 | return ticks * gpmc_get_fclk_period(); | |
374 | } | |
375 | ||
376 | static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps) | |
377 | { | |
378 | unsigned long ticks = gpmc_ps_to_ticks(time_ps); | |
379 | ||
380 | return ticks * gpmc_get_fclk_period(); | |
381 | } | |
382 | ||
559d94b0 AM |
383 | static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value) |
384 | { | |
385 | u32 l; | |
386 | ||
387 | l = gpmc_cs_read_reg(cs, reg); | |
388 | if (value) | |
389 | l |= mask; | |
390 | else | |
391 | l &= ~mask; | |
392 | gpmc_cs_write_reg(cs, reg, l); | |
393 | } | |
394 | ||
395 | static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p) | |
396 | { | |
397 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1, | |
398 | GPMC_CONFIG1_TIME_PARA_GRAN, | |
399 | p->time_para_granularity); | |
400 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2, | |
401 | GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay); | |
402 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3, | |
403 | GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay); | |
404 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
405 | GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay); | |
406 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
8f50b8e5 | 407 | GPMC_CONFIG4_WEEXTRADELAY, p->we_extra_delay); |
559d94b0 AM |
408 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, |
409 | GPMC_CONFIG6_CYCLE2CYCLESAMECSEN, | |
410 | p->cycle2cyclesamecsen); | |
411 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
412 | GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN, | |
413 | p->cycle2cyclediffcsen); | |
414 | } | |
415 | ||
63aa945b | 416 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
563dbb26 RA |
417 | /** |
418 | * get_gpmc_timing_reg - read a timing parameter and print DTS settings for it. | |
419 | * @cs: Chip Select Region | |
420 | * @reg: GPMC_CS_CONFIGn register offset. | |
421 | * @st_bit: Start Bit | |
422 | * @end_bit: End Bit. Must be >= @st_bit. | |
80c4f5a8 | 423 | * @max: Maximum parameter value (before optional @shift). |
4b613e9b | 424 | * If 0, maximum is as high as @st_bit and @end_bit allow. |
563dbb26 | 425 | * @name: DTS node name, w/o "gpmc," |
7f2e8c58 RA |
426 | * @cd: Clock Domain of timing parameter. |
427 | * @shift: Parameter value left shifts @shift, which is then printed instead of value. | |
563dbb26 RA |
428 | * @raw: Raw Format Option. |
429 | * raw format: gpmc,name = <value> | |
430 | * tick format: gpmc,name = <value> /‍* x ns -- y ns; x ticks *‍/ | |
431 | * Where x ns -- y ns result in the same tick value. | |
4b613e9b | 432 | * When @max is exceeded, "invalid" is printed inside comment. |
563dbb26 | 433 | * @noval: Parameter values equal to 0 are not printed. |
563dbb26 RA |
434 | * @return: Specified timing parameter (after optional @shift). |
435 | * | |
436 | */ | |
7f2e8c58 RA |
437 | static int get_gpmc_timing_reg( |
438 | /* timing specifiers */ | |
4b613e9b | 439 | int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 RA |
440 | const char *name, const enum gpmc_clk_domain cd, |
441 | /* value transform */ | |
442 | int shift, | |
443 | /* format specifiers */ | |
444 | bool raw, bool noval) | |
35ac051e TL |
445 | { |
446 | u32 l; | |
563dbb26 RA |
447 | int nr_bits; |
448 | int mask; | |
4b613e9b | 449 | bool invalid; |
35ac051e TL |
450 | |
451 | l = gpmc_cs_read_reg(cs, reg); | |
452 | nr_bits = end_bit - st_bit + 1; | |
563dbb26 RA |
453 | mask = (1 << nr_bits) - 1; |
454 | l = (l >> st_bit) & mask; | |
4b613e9b RA |
455 | if (!max) |
456 | max = mask; | |
457 | invalid = l > max; | |
35ac051e TL |
458 | if (shift) |
459 | l = (shift << l); | |
460 | if (noval && (l == 0)) | |
461 | return 0; | |
462 | if (!raw) { | |
563dbb26 RA |
463 | /* DTS tick format for timings in ns */ |
464 | unsigned int time_ns; | |
465 | unsigned int time_ns_min = 0; | |
35ac051e | 466 | |
563dbb26 | 467 | if (l) |
7f2e8c58 RA |
468 | time_ns_min = gpmc_clk_ticks_to_ns(l - 1, cs, cd) + 1; |
469 | time_ns = gpmc_clk_ticks_to_ns(l, cs, cd); | |
95c278b2 | 470 | pr_info("gpmc,%s = <%u>; /* %u ns - %u ns; %i ticks%s*/\n", |
4b613e9b RA |
471 | name, time_ns, time_ns_min, time_ns, l, |
472 | invalid ? "; invalid " : " "); | |
35ac051e | 473 | } else { |
563dbb26 | 474 | /* raw format */ |
95c278b2 | 475 | pr_info("gpmc,%s = <%u>;%s\n", name, l, |
4b613e9b | 476 | invalid ? " /* invalid */" : ""); |
35ac051e TL |
477 | } |
478 | ||
479 | return l; | |
480 | } | |
481 | ||
482 | #define GPMC_PRINT_CONFIG(cs, config) \ | |
483 | pr_info("cs%i %s: 0x%08x\n", cs, #config, \ | |
484 | gpmc_cs_read_reg(cs, config)) | |
485 | #define GPMC_GET_RAW(reg, st, end, field) \ | |
4b613e9b RA |
486 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 0) |
487 | #define GPMC_GET_RAW_MAX(reg, st, end, max, field) \ | |
488 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, 0, 1, 0) | |
35ac051e | 489 | #define GPMC_GET_RAW_BOOL(reg, st, end, field) \ |
4b613e9b RA |
490 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 1) |
491 | #define GPMC_GET_RAW_SHIFT_MAX(reg, st, end, shift, max, field) \ | |
492 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, (shift), 1, 1) | |
35ac051e | 493 | #define GPMC_GET_TICKS(reg, st, end, field) \ |
4b613e9b | 494 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 0, 0) |
7f2e8c58 | 495 | #define GPMC_GET_TICKS_CD(reg, st, end, field, cd) \ |
4b613e9b RA |
496 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, (cd), 0, 0, 0) |
497 | #define GPMC_GET_TICKS_CD_MAX(reg, st, end, max, field, cd) \ | |
498 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, (cd), 0, 0, 0) | |
35ac051e TL |
499 | |
500 | static void gpmc_show_regs(int cs, const char *desc) | |
501 | { | |
502 | pr_info("gpmc cs%i %s:\n", cs, desc); | |
503 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG1); | |
504 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG2); | |
505 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG3); | |
506 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG4); | |
507 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG5); | |
508 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG6); | |
509 | } | |
510 | ||
511 | /* | |
512 | * Note that gpmc,wait-pin handing wrongly assumes bit 8 is available, | |
513 | * see commit c9fb809. | |
514 | */ | |
515 | static void gpmc_cs_show_timings(int cs, const char *desc) | |
516 | { | |
517 | gpmc_show_regs(cs, desc); | |
518 | ||
519 | pr_info("gpmc cs%i access configuration:\n", cs); | |
520 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 4, 4, "time-para-granularity"); | |
521 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 8, 9, "mux-add-data"); | |
aff523fb | 522 | GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 12, 13, 1, |
cdd1aeae | 523 | GPMC_CONFIG1_DEVICESIZE_MAX, "device-width"); |
35ac051e TL |
524 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 16, 17, "wait-pin"); |
525 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 21, 21, "wait-on-write"); | |
526 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 22, 22, "wait-on-read"); | |
4b613e9b RA |
527 | GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 23, 24, 4, |
528 | GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX, | |
529 | "burst-length"); | |
35ac051e TL |
530 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 27, 27, "sync-write"); |
531 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 28, 28, "burst-write"); | |
532 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 29, 29, "gpmc,sync-read"); | |
533 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 30, 30, "burst-read"); | |
534 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 31, 31, "burst-wrap"); | |
535 | ||
536 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG2, 7, 7, "cs-extra-delay"); | |
537 | ||
538 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG3, 7, 7, "adv-extra-delay"); | |
539 | ||
540 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 23, 23, "we-extra-delay"); | |
541 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 7, 7, "oe-extra-delay"); | |
542 | ||
543 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 7, 7, "cycle2cycle-samecsen"); | |
544 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 6, 6, "cycle2cycle-diffcsen"); | |
545 | ||
546 | pr_info("gpmc cs%i timings configuration:\n", cs); | |
547 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 0, 3, "cs-on-ns"); | |
548 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 8, 12, "cs-rd-off-ns"); | |
549 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 16, 20, "cs-wr-off-ns"); | |
550 | ||
551 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 0, 3, "adv-on-ns"); | |
552 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 8, 12, "adv-rd-off-ns"); | |
553 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 16, 20, "adv-wr-off-ns"); | |
2c92c04b NA |
554 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
555 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 4, 6, "adv-aad-mux-on-ns"); | |
556 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 24, 26, | |
557 | "adv-aad-mux-rd-off-ns"); | |
558 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 28, 30, | |
559 | "adv-aad-mux-wr-off-ns"); | |
560 | } | |
35ac051e TL |
561 | |
562 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 0, 3, "oe-on-ns"); | |
563 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 8, 12, "oe-off-ns"); | |
2c92c04b NA |
564 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
565 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 4, 6, "oe-aad-mux-on-ns"); | |
566 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 13, 15, "oe-aad-mux-off-ns"); | |
567 | } | |
35ac051e TL |
568 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 16, 19, "we-on-ns"); |
569 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 24, 28, "we-off-ns"); | |
570 | ||
571 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 0, 4, "rd-cycle-ns"); | |
572 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 8, 12, "wr-cycle-ns"); | |
573 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 16, 20, "access-ns"); | |
574 | ||
575 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 24, 27, "page-burst-access-ns"); | |
576 | ||
577 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 0, 3, "bus-turnaround-ns"); | |
578 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 8, 11, "cycle2cycle-delay-ns"); | |
579 | ||
4b613e9b RA |
580 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 18, 19, |
581 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
582 | "wait-monitoring-ns", GPMC_CD_CLK); | |
583 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 25, 26, | |
584 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
585 | "clk-activation-ns", GPMC_CD_FCLK); | |
35ac051e TL |
586 | |
587 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 16, 19, "wr-data-mux-bus-ns"); | |
588 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 24, 28, "wr-access-ns"); | |
589 | } | |
4bbbc1ad | 590 | #else |
35ac051e TL |
591 | static inline void gpmc_cs_show_timings(int cs, const char *desc) |
592 | { | |
593 | } | |
4bbbc1ad | 594 | #endif |
35ac051e | 595 | |
7f2e8c58 RA |
596 | /** |
597 | * set_gpmc_timing_reg - set a single timing parameter for Chip Select Region. | |
598 | * Caller is expected to have initialized CONFIG1 GPMCFCLKDIVIDER | |
599 | * prior to calling this function with @cd equal to GPMC_CD_CLK. | |
600 | * | |
601 | * @cs: Chip Select Region. | |
602 | * @reg: GPMC_CS_CONFIGn register offset. | |
603 | * @st_bit: Start Bit | |
604 | * @end_bit: End Bit. Must be >= @st_bit. | |
4b613e9b RA |
605 | * @max: Maximum parameter value. |
606 | * If 0, maximum is as high as @st_bit and @end_bit allow. | |
7f2e8c58 RA |
607 | * @time: Timing parameter in ns. |
608 | * @cd: Timing parameter clock domain. | |
609 | * @name: Timing parameter name. | |
610 | * @return: 0 on success, -1 on error. | |
611 | */ | |
4b613e9b | 612 | static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 | 613 | int time, enum gpmc_clk_domain cd, const char *name) |
4bbbc1ad JY |
614 | { |
615 | u32 l; | |
616 | int ticks, mask, nr_bits; | |
617 | ||
618 | if (time == 0) | |
619 | ticks = 0; | |
620 | else | |
7f2e8c58 | 621 | ticks = gpmc_ns_to_clk_ticks(time, cs, cd); |
4bbbc1ad | 622 | nr_bits = end_bit - st_bit + 1; |
80323742 RQ |
623 | mask = (1 << nr_bits) - 1; |
624 | ||
4b613e9b RA |
625 | if (!max) |
626 | max = mask; | |
627 | ||
628 | if (ticks > max) { | |
7f2e8c58 | 629 | pr_err("%s: GPMC CS%d: %s %d ns, %d ticks > %d ticks\n", |
4b613e9b | 630 | __func__, cs, name, time, ticks, max); |
80323742 | 631 | |
4bbbc1ad | 632 | return -1; |
1c22cc13 | 633 | } |
4bbbc1ad | 634 | |
4bbbc1ad | 635 | l = gpmc_cs_read_reg(cs, reg); |
63aa945b | 636 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
cdd1aeae KK |
637 | pr_info("GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", |
638 | cs, name, ticks, gpmc_get_clk_period(cs, cd) * ticks / 1000, | |
1c22cc13 | 639 | (l >> st_bit) & mask, time); |
4bbbc1ad JY |
640 | #endif |
641 | l &= ~(mask << st_bit); | |
642 | l |= ticks << st_bit; | |
643 | gpmc_cs_write_reg(cs, reg, l); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
2e676901 RA |
648 | /** |
649 | * gpmc_calc_waitmonitoring_divider - calculate proper GPMCFCLKDIVIDER based on WAITMONITORINGTIME | |
650 | * WAITMONITORINGTIME will be _at least_ as long as desired, i.e. | |
651 | * read --> don't sample bus too early | |
652 | * write --> data is longer on bus | |
653 | * | |
654 | * Formula: | |
655 | * gpmc_clk_div + 1 = ceil(ceil(waitmonitoringtime_ns / gpmc_fclk_ns) | |
656 | * / waitmonitoring_ticks) | |
657 | * WAITMONITORINGTIME resulting in 0 or 1 tick with div = 1 are caught by | |
658 | * div <= 0 check. | |
659 | * | |
660 | * @wait_monitoring: WAITMONITORINGTIME in ns. | |
661 | * @return: -1 on failure to scale, else proper divider > 0. | |
662 | */ | |
663 | static int gpmc_calc_waitmonitoring_divider(unsigned int wait_monitoring) | |
664 | { | |
2e676901 RA |
665 | int div = gpmc_ns_to_ticks(wait_monitoring); |
666 | ||
667 | div += GPMC_CONFIG1_WAITMONITORINGTIME_MAX - 1; | |
668 | div /= GPMC_CONFIG1_WAITMONITORINGTIME_MAX; | |
669 | ||
670 | if (div > 4) | |
671 | return -1; | |
672 | if (div <= 0) | |
673 | div = 1; | |
674 | ||
675 | return div; | |
2e676901 RA |
676 | } |
677 | ||
678 | /** | |
679 | * gpmc_calc_divider - calculate GPMC_FCLK divider for sync_clk GPMC_CLK period. | |
680 | * @sync_clk: GPMC_CLK period in ps. | |
681 | * @return: Returns at least 1 if GPMC_FCLK can be divided to GPMC_CLK. | |
682 | * Else, returns -1. | |
683 | */ | |
1b47ca1a | 684 | int gpmc_calc_divider(unsigned int sync_clk) |
4bbbc1ad | 685 | { |
2e676901 | 686 | int div = gpmc_ps_to_ticks(sync_clk); |
4bbbc1ad | 687 | |
4bbbc1ad JY |
688 | if (div > 4) |
689 | return -1; | |
1c22cc13 | 690 | if (div <= 0) |
4bbbc1ad JY |
691 | div = 1; |
692 | ||
693 | return div; | |
694 | } | |
695 | ||
2e676901 RA |
696 | /** |
697 | * gpmc_cs_set_timings - program timing parameters for Chip Select Region. | |
698 | * @cs: Chip Select Region. | |
699 | * @t: GPMC timing parameters. | |
700 | * @s: GPMC timing settings. | |
701 | * @return: 0 on success, -1 on error. | |
702 | */ | |
703 | int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t, | |
704 | const struct gpmc_settings *s) | |
4bbbc1ad | 705 | { |
1724f1b6 | 706 | int div, ret; |
4bbbc1ad JY |
707 | u32 l; |
708 | ||
1b47ca1a | 709 | div = gpmc_calc_divider(t->sync_clk); |
4bbbc1ad | 710 | if (div < 0) |
d25112aa | 711 | return -EINVAL; |
4bbbc1ad | 712 | |
2e676901 RA |
713 | /* |
714 | * See if we need to change the divider for waitmonitoringtime. | |
715 | * | |
716 | * Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for | |
717 | * pure asynchronous accesses, i.e. both read and write asynchronous. | |
718 | * However, only do so if WAITMONITORINGTIME is actually used, i.e. | |
719 | * either WAITREADMONITORING or WAITWRITEMONITORING is set. | |
720 | * | |
721 | * This statement must not change div to scale async WAITMONITORINGTIME | |
722 | * to protect mixed synchronous and asynchronous accesses. | |
723 | * | |
724 | * We raise an error later if WAITMONITORINGTIME does not fit. | |
725 | */ | |
726 | if (!s->sync_read && !s->sync_write && | |
727 | (s->wait_on_read || s->wait_on_write) | |
728 | ) { | |
2e676901 RA |
729 | div = gpmc_calc_waitmonitoring_divider(t->wait_monitoring); |
730 | if (div < 0) { | |
731 | pr_err("%s: waitmonitoringtime %3d ns too large for greatest gpmcfclkdivider.\n", | |
732 | __func__, | |
733 | t->wait_monitoring | |
734 | ); | |
d25112aa | 735 | return -ENXIO; |
2e676901 RA |
736 | } |
737 | } | |
738 | ||
1724f1b6 KK |
739 | ret = 0; |
740 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 0, 3, 0, t->cs_on, | |
741 | GPMC_CD_FCLK, "cs_on"); | |
742 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 8, 12, 0, t->cs_rd_off, | |
743 | GPMC_CD_FCLK, "cs_rd_off"); | |
744 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 16, 20, 0, t->cs_wr_off, | |
745 | GPMC_CD_FCLK, "cs_wr_off"); | |
746 | if (ret) | |
747 | return -ENXIO; | |
748 | ||
749 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 0, 3, 0, t->adv_on, | |
750 | GPMC_CD_FCLK, "adv_on"); | |
751 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 8, 12, 0, t->adv_rd_off, | |
752 | GPMC_CD_FCLK, "adv_rd_off"); | |
753 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 16, 20, 0, t->adv_wr_off, | |
754 | GPMC_CD_FCLK, "adv_wr_off"); | |
755 | if (ret) | |
756 | return -ENXIO; | |
4bbbc1ad | 757 | |
2c92c04b | 758 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
1724f1b6 KK |
759 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 4, 6, 0, |
760 | t->adv_aad_mux_on, GPMC_CD_FCLK, | |
761 | "adv_aad_mux_on"); | |
762 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 24, 26, 0, | |
763 | t->adv_aad_mux_rd_off, GPMC_CD_FCLK, | |
764 | "adv_aad_mux_rd_off"); | |
765 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 28, 30, 0, | |
766 | t->adv_aad_mux_wr_off, GPMC_CD_FCLK, | |
767 | "adv_aad_mux_wr_off"); | |
768 | if (ret) | |
769 | return -ENXIO; | |
2c92c04b | 770 | } |
4bbbc1ad | 771 | |
1724f1b6 KK |
772 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 0, 3, 0, t->oe_on, |
773 | GPMC_CD_FCLK, "oe_on"); | |
774 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 8, 12, 0, t->oe_off, | |
775 | GPMC_CD_FCLK, "oe_off"); | |
2c92c04b | 776 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
1724f1b6 KK |
777 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 4, 6, 0, |
778 | t->oe_aad_mux_on, GPMC_CD_FCLK, | |
779 | "oe_aad_mux_on"); | |
780 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 13, 15, 0, | |
781 | t->oe_aad_mux_off, GPMC_CD_FCLK, | |
782 | "oe_aad_mux_off"); | |
783 | } | |
784 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 16, 19, 0, t->we_on, | |
785 | GPMC_CD_FCLK, "we_on"); | |
786 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 24, 28, 0, t->we_off, | |
787 | GPMC_CD_FCLK, "we_off"); | |
788 | if (ret) | |
789 | return -ENXIO; | |
790 | ||
791 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 0, 4, 0, t->rd_cycle, | |
792 | GPMC_CD_FCLK, "rd_cycle"); | |
793 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 8, 12, 0, t->wr_cycle, | |
794 | GPMC_CD_FCLK, "wr_cycle"); | |
795 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 16, 20, 0, t->access, | |
796 | GPMC_CD_FCLK, "access"); | |
797 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 24, 27, 0, | |
798 | t->page_burst_access, GPMC_CD_FCLK, | |
799 | "page_burst_access"); | |
800 | if (ret) | |
801 | return -ENXIO; | |
802 | ||
803 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 0, 3, 0, | |
804 | t->bus_turnaround, GPMC_CD_FCLK, | |
805 | "bus_turnaround"); | |
806 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 8, 11, 0, | |
807 | t->cycle2cycle_delay, GPMC_CD_FCLK, | |
808 | "cycle2cycle_delay"); | |
809 | if (ret) | |
810 | return -ENXIO; | |
811 | ||
812 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) { | |
813 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 16, 19, 0, | |
814 | t->wr_data_mux_bus, GPMC_CD_FCLK, | |
815 | "wr_data_mux_bus"); | |
816 | if (ret) | |
817 | return -ENXIO; | |
818 | } | |
819 | if (gpmc_capability & GPMC_HAS_WR_ACCESS) { | |
820 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 24, 28, 0, | |
821 | t->wr_access, GPMC_CD_FCLK, | |
822 | "wr_access"); | |
823 | if (ret) | |
824 | return -ENXIO; | |
2c92c04b | 825 | } |
cc26b3b0 | 826 | |
1c22cc13 | 827 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); |
7f2e8c58 RA |
828 | l &= ~0x03; |
829 | l |= (div - 1); | |
830 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); | |
831 | ||
1724f1b6 KK |
832 | ret = 0; |
833 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG1, 18, 19, | |
834 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
835 | t->wait_monitoring, GPMC_CD_CLK, | |
836 | "wait_monitoring"); | |
837 | ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG1, 25, 26, | |
838 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
839 | t->clk_activation, GPMC_CD_FCLK, | |
840 | "clk_activation"); | |
841 | if (ret) | |
842 | return -ENXIO; | |
7f2e8c58 | 843 | |
63aa945b | 844 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
f585070b RA |
845 | pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n", |
846 | cs, (div * gpmc_get_fclk_period()) / 1000, div); | |
4bbbc1ad | 847 | #endif |
4bbbc1ad | 848 | |
559d94b0 | 849 | gpmc_cs_bool_timings(cs, &t->bool_timings); |
35ac051e | 850 | gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings"); |
559d94b0 | 851 | |
4bbbc1ad JY |
852 | return 0; |
853 | } | |
854 | ||
4cf27d2e | 855 | static int gpmc_cs_set_memconf(int cs, u32 base, u32 size) |
f37e4580 ID |
856 | { |
857 | u32 l; | |
858 | u32 mask; | |
859 | ||
c71f8e9b JH |
860 | /* |
861 | * Ensure that base address is aligned on a | |
862 | * boundary equal to or greater than size. | |
863 | */ | |
864 | if (base & (size - 1)) | |
865 | return -EINVAL; | |
866 | ||
9c4f757e | 867 | base >>= GPMC_CHUNK_SHIFT; |
f37e4580 | 868 | mask = (1 << GPMC_SECTION_SHIFT) - size; |
9c4f757e SP |
869 | mask >>= GPMC_CHUNK_SHIFT; |
870 | mask <<= GPMC_CONFIG7_MASKADDRESS_OFFSET; | |
871 | ||
f37e4580 | 872 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
9c4f757e SP |
873 | l &= ~GPMC_CONFIG7_MASK; |
874 | l |= base & GPMC_CONFIG7_BASEADDRESS_MASK; | |
875 | l |= mask & GPMC_CONFIG7_MASKADDRESS_MASK; | |
a2d3e7ba | 876 | l |= GPMC_CONFIG7_CSVALID; |
f37e4580 | 877 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
c71f8e9b JH |
878 | |
879 | return 0; | |
f37e4580 ID |
880 | } |
881 | ||
4cf27d2e RQ |
882 | static void gpmc_cs_enable_mem(int cs) |
883 | { | |
884 | u32 l; | |
885 | ||
886 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
887 | l |= GPMC_CONFIG7_CSVALID; | |
888 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); | |
889 | } | |
890 | ||
f37e4580 ID |
891 | static void gpmc_cs_disable_mem(int cs) |
892 | { | |
893 | u32 l; | |
894 | ||
895 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 896 | l &= ~GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
897 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
898 | } | |
899 | ||
900 | static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size) | |
901 | { | |
902 | u32 l; | |
903 | u32 mask; | |
904 | ||
905 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
906 | *base = (l & 0x3f) << GPMC_CHUNK_SHIFT; | |
907 | mask = (l >> 8) & 0x0f; | |
908 | *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT); | |
909 | } | |
910 | ||
911 | static int gpmc_cs_mem_enabled(int cs) | |
912 | { | |
913 | u32 l; | |
914 | ||
915 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 916 | return l & GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
917 | } |
918 | ||
f5d8edaf | 919 | static void gpmc_cs_set_reserved(int cs, int reserved) |
4bbbc1ad | 920 | { |
9ed7a776 TL |
921 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
922 | ||
923 | gpmc->flags |= GPMC_CS_RESERVED; | |
f37e4580 ID |
924 | } |
925 | ||
ae9d908a | 926 | static bool gpmc_cs_reserved(int cs) |
f37e4580 | 927 | { |
9ed7a776 TL |
928 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
929 | ||
930 | return gpmc->flags & GPMC_CS_RESERVED; | |
931 | } | |
932 | ||
f37e4580 ID |
933 | static unsigned long gpmc_mem_align(unsigned long size) |
934 | { | |
935 | int order; | |
936 | ||
937 | size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1); | |
938 | order = GPMC_CHUNK_SHIFT - 1; | |
939 | do { | |
940 | size >>= 1; | |
941 | order++; | |
942 | } while (size); | |
943 | size = 1 << order; | |
944 | return size; | |
945 | } | |
946 | ||
947 | static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size) | |
948 | { | |
9ed7a776 TL |
949 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
950 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
951 | int r; |
952 | ||
953 | size = gpmc_mem_align(size); | |
954 | spin_lock(&gpmc_mem_lock); | |
955 | res->start = base; | |
956 | res->end = base + size - 1; | |
957 | r = request_resource(&gpmc_mem_root, res); | |
958 | spin_unlock(&gpmc_mem_lock); | |
959 | ||
960 | return r; | |
961 | } | |
962 | ||
da496873 AM |
963 | static int gpmc_cs_delete_mem(int cs) |
964 | { | |
9ed7a776 TL |
965 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
966 | struct resource *res = &gpmc->mem; | |
da496873 AM |
967 | int r; |
968 | ||
969 | spin_lock(&gpmc_mem_lock); | |
efe80723 | 970 | r = release_resource(res); |
da496873 AM |
971 | res->start = 0; |
972 | res->end = 0; | |
973 | spin_unlock(&gpmc_mem_lock); | |
974 | ||
975 | return r; | |
976 | } | |
977 | ||
f37e4580 ID |
978 | int gpmc_cs_request(int cs, unsigned long size, unsigned long *base) |
979 | { | |
9ed7a776 TL |
980 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
981 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
982 | int r = -1; |
983 | ||
4c54228a | 984 | if (cs >= gpmc_cs_num) { |
f34f3716 | 985 | pr_err("%s: requested chip-select is disabled\n", __func__); |
f37e4580 | 986 | return -ENODEV; |
f34f3716 | 987 | } |
f37e4580 ID |
988 | size = gpmc_mem_align(size); |
989 | if (size > (1 << GPMC_SECTION_SHIFT)) | |
990 | return -ENOMEM; | |
991 | ||
992 | spin_lock(&gpmc_mem_lock); | |
993 | if (gpmc_cs_reserved(cs)) { | |
994 | r = -EBUSY; | |
995 | goto out; | |
996 | } | |
997 | if (gpmc_cs_mem_enabled(cs)) | |
998 | r = adjust_resource(res, res->start & ~(size - 1), size); | |
999 | if (r < 0) | |
1000 | r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0, | |
1001 | size, NULL, NULL); | |
1002 | if (r < 0) | |
1003 | goto out; | |
1004 | ||
4cf27d2e RQ |
1005 | /* Disable CS while changing base address and size mask */ |
1006 | gpmc_cs_disable_mem(cs); | |
1007 | ||
1008 | r = gpmc_cs_set_memconf(cs, res->start, resource_size(res)); | |
c71f8e9b JH |
1009 | if (r < 0) { |
1010 | release_resource(res); | |
1011 | goto out; | |
1012 | } | |
1013 | ||
4cf27d2e RQ |
1014 | /* Enable CS */ |
1015 | gpmc_cs_enable_mem(cs); | |
f37e4580 ID |
1016 | *base = res->start; |
1017 | gpmc_cs_set_reserved(cs, 1); | |
1018 | out: | |
1019 | spin_unlock(&gpmc_mem_lock); | |
1020 | return r; | |
1021 | } | |
fd1dc87d | 1022 | EXPORT_SYMBOL(gpmc_cs_request); |
f37e4580 ID |
1023 | |
1024 | void gpmc_cs_free(int cs) | |
1025 | { | |
e004c3e6 CIK |
1026 | struct gpmc_cs_data *gpmc; |
1027 | struct resource *res; | |
efe80723 | 1028 | |
f37e4580 | 1029 | spin_lock(&gpmc_mem_lock); |
f34f3716 | 1030 | if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) { |
07b6cc45 | 1031 | WARN(1, "Trying to free non-reserved GPMC CS%d\n", cs); |
f37e4580 ID |
1032 | spin_unlock(&gpmc_mem_lock); |
1033 | return; | |
1034 | } | |
e004c3e6 CIK |
1035 | gpmc = &gpmc_cs[cs]; |
1036 | res = &gpmc->mem; | |
1037 | ||
f37e4580 | 1038 | gpmc_cs_disable_mem(cs); |
efe80723 TL |
1039 | if (res->flags) |
1040 | release_resource(res); | |
f37e4580 ID |
1041 | gpmc_cs_set_reserved(cs, 0); |
1042 | spin_unlock(&gpmc_mem_lock); | |
1043 | } | |
fd1dc87d | 1044 | EXPORT_SYMBOL(gpmc_cs_free); |
f37e4580 | 1045 | |
89aed3cd BN |
1046 | static bool gpmc_is_valid_waitpin(u32 waitpin) |
1047 | { | |
8dd7e4af | 1048 | return waitpin < gpmc_nr_waitpins; |
89aed3cd BN |
1049 | } |
1050 | ||
1051 | static int gpmc_alloc_waitpin(struct gpmc_device *gpmc, | |
1052 | struct gpmc_settings *p) | |
1053 | { | |
1054 | int ret; | |
1055 | struct gpmc_waitpin *waitpin; | |
1056 | struct gpio_desc *waitpin_desc; | |
1057 | ||
1058 | if (!gpmc_is_valid_waitpin(p->wait_pin)) | |
1059 | return -EINVAL; | |
1060 | ||
1061 | waitpin = &gpmc->waitpins[p->wait_pin]; | |
1062 | ||
1063 | if (!waitpin->desc) { | |
1064 | /* Reserve the GPIO for wait pin usage. | |
1065 | * GPIO polarity doesn't matter here. Wait pin polarity | |
1066 | * is set in GPMC_CONFIG register. | |
1067 | */ | |
1068 | waitpin_desc = gpiochip_request_own_desc(&gpmc->gpio_chip, | |
1069 | p->wait_pin, "WAITPIN", | |
1070 | GPIO_ACTIVE_HIGH, | |
1071 | GPIOD_IN); | |
1072 | ||
1073 | ret = PTR_ERR(waitpin_desc); | |
1074 | if (IS_ERR(waitpin_desc) && ret != -EBUSY) | |
1075 | return ret; | |
1076 | ||
1077 | /* New wait pin */ | |
1078 | waitpin->desc = waitpin_desc; | |
1079 | waitpin->pin = p->wait_pin; | |
1080 | waitpin->polarity = p->wait_pin_polarity; | |
1081 | } else { | |
1082 | /* Shared wait pin */ | |
1083 | if (p->wait_pin_polarity != waitpin->polarity || | |
1084 | p->wait_pin != waitpin->pin) { | |
1085 | dev_err(gpmc->dev, | |
1086 | "shared-wait-pin: invalid configuration\n"); | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | dev_info(gpmc->dev, "shared wait-pin: %d\n", waitpin->pin); | |
1090 | } | |
1091 | ||
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | static void gpmc_free_waitpin(struct gpmc_device *gpmc, | |
1096 | int wait_pin) | |
1097 | { | |
1098 | if (gpmc_is_valid_waitpin(wait_pin)) | |
1099 | gpiochip_free_own_desc(gpmc->waitpins[wait_pin].desc); | |
1100 | } | |
1101 | ||
948d38e7 | 1102 | /** |
3a544354 | 1103 | * gpmc_configure - write request to configure gpmc |
948d38e7 SG |
1104 | * @cmd: command type |
1105 | * @wval: value to write | |
1106 | * @return status of the operation | |
1107 | */ | |
3a544354 | 1108 | int gpmc_configure(int cmd, int wval) |
948d38e7 | 1109 | { |
3a544354 | 1110 | u32 regval; |
948d38e7 SG |
1111 | |
1112 | switch (cmd) { | |
948d38e7 SG |
1113 | case GPMC_CONFIG_WP: |
1114 | regval = gpmc_read_reg(GPMC_CONFIG); | |
1115 | if (wval) | |
1116 | regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */ | |
1117 | else | |
1118 | regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */ | |
1119 | gpmc_write_reg(GPMC_CONFIG, regval); | |
1120 | break; | |
1121 | ||
948d38e7 | 1122 | default: |
3a544354 JH |
1123 | pr_err("%s: command not supported\n", __func__); |
1124 | return -EINVAL; | |
948d38e7 SG |
1125 | } |
1126 | ||
3a544354 | 1127 | return 0; |
948d38e7 | 1128 | } |
3a544354 | 1129 | EXPORT_SYMBOL(gpmc_configure); |
948d38e7 | 1130 | |
a622c641 LM |
1131 | static bool gpmc_nand_writebuffer_empty(void) |
1132 | { | |
1133 | if (gpmc_read_reg(GPMC_STATUS) & GPMC_STATUS_EMPTYWRITEBUFFERSTATUS) | |
1134 | return true; | |
1135 | ||
1136 | return false; | |
1137 | } | |
1138 | ||
1139 | static struct gpmc_nand_ops nand_ops = { | |
1140 | .nand_writebuffer_empty = gpmc_nand_writebuffer_empty, | |
1141 | }; | |
1142 | ||
1143 | /** | |
1144 | * gpmc_omap_get_nand_ops - Get the GPMC NAND interface | |
80c4f5a8 | 1145 | * @reg: the GPMC NAND register map exclusive for NAND use. |
a622c641 LM |
1146 | * @cs: GPMC chip select number on which the NAND sits. The |
1147 | * register map returned will be specific to this chip select. | |
1148 | * | |
1149 | * Returns NULL on error e.g. invalid cs. | |
1150 | */ | |
1151 | struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *reg, int cs) | |
52bd138d | 1152 | { |
2fdf0c98 AM |
1153 | int i; |
1154 | ||
a622c641 LM |
1155 | if (cs >= gpmc_cs_num) |
1156 | return NULL; | |
1157 | ||
52bd138d AM |
1158 | reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET + |
1159 | GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs; | |
1160 | reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET + | |
1161 | GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs; | |
1162 | reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET + | |
1163 | GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs; | |
1164 | reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1; | |
1165 | reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2; | |
1166 | reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL; | |
1167 | reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS; | |
1168 | reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG; | |
1169 | reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL; | |
1170 | reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG; | |
1171 | reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT; | |
2fdf0c98 AM |
1172 | |
1173 | for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) { | |
1174 | reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 + | |
1175 | GPMC_BCH_SIZE * i; | |
1176 | reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 + | |
1177 | GPMC_BCH_SIZE * i; | |
1178 | reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 + | |
1179 | GPMC_BCH_SIZE * i; | |
1180 | reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 + | |
1181 | GPMC_BCH_SIZE * i; | |
27c9fd60 | 1182 | reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 + |
1183 | i * GPMC_BCH_SIZE; | |
1184 | reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 + | |
1185 | i * GPMC_BCH_SIZE; | |
1186 | reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 + | |
1187 | i * GPMC_BCH_SIZE; | |
2fdf0c98 | 1188 | } |
f47fcad6 RQ |
1189 | |
1190 | return &nand_ops; | |
1191 | } | |
1192 | EXPORT_SYMBOL_GPL(gpmc_omap_get_nand_ops); | |
1193 | ||
a758f50f LM |
1194 | static void gpmc_omap_onenand_calc_sync_timings(struct gpmc_timings *t, |
1195 | struct gpmc_settings *s, | |
1196 | int freq, int latency) | |
1197 | { | |
1198 | struct gpmc_device_timings dev_t; | |
1199 | const int t_cer = 15; | |
1200 | const int t_avdp = 12; | |
1201 | const int t_cez = 20; /* max of t_cez, t_oez */ | |
1202 | const int t_wpl = 40; | |
1203 | const int t_wph = 30; | |
1204 | int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo; | |
1205 | ||
1206 | switch (freq) { | |
1207 | case 104: | |
1208 | min_gpmc_clk_period = 9600; /* 104 MHz */ | |
1209 | t_ces = 3; | |
1210 | t_avds = 4; | |
1211 | t_avdh = 2; | |
1212 | t_ach = 3; | |
1213 | t_aavdh = 6; | |
1214 | t_rdyo = 6; | |
1215 | break; | |
1216 | case 83: | |
1217 | min_gpmc_clk_period = 12000; /* 83 MHz */ | |
1218 | t_ces = 5; | |
1219 | t_avds = 4; | |
1220 | t_avdh = 2; | |
1221 | t_ach = 6; | |
1222 | t_aavdh = 6; | |
1223 | t_rdyo = 9; | |
1224 | break; | |
1225 | case 66: | |
1226 | min_gpmc_clk_period = 15000; /* 66 MHz */ | |
1227 | t_ces = 6; | |
1228 | t_avds = 5; | |
1229 | t_avdh = 2; | |
1230 | t_ach = 6; | |
1231 | t_aavdh = 6; | |
1232 | t_rdyo = 11; | |
1233 | break; | |
1234 | default: | |
1235 | min_gpmc_clk_period = 18500; /* 54 MHz */ | |
1236 | t_ces = 7; | |
1237 | t_avds = 7; | |
1238 | t_avdh = 7; | |
1239 | t_ach = 9; | |
1240 | t_aavdh = 7; | |
1241 | t_rdyo = 15; | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | /* Set synchronous read timings */ | |
1246 | memset(&dev_t, 0, sizeof(dev_t)); | |
1247 | ||
1248 | if (!s->sync_write) { | |
1249 | dev_t.t_avdp_w = max(t_avdp, t_cer) * 1000; | |
1250 | dev_t.t_wpl = t_wpl * 1000; | |
1251 | dev_t.t_wph = t_wph * 1000; | |
1252 | dev_t.t_aavdh = t_aavdh * 1000; | |
1253 | } | |
1254 | dev_t.ce_xdelay = true; | |
1255 | dev_t.avd_xdelay = true; | |
1256 | dev_t.oe_xdelay = true; | |
1257 | dev_t.we_xdelay = true; | |
1258 | dev_t.clk = min_gpmc_clk_period; | |
1259 | dev_t.t_bacc = dev_t.clk; | |
1260 | dev_t.t_ces = t_ces * 1000; | |
1261 | dev_t.t_avds = t_avds * 1000; | |
1262 | dev_t.t_avdh = t_avdh * 1000; | |
1263 | dev_t.t_ach = t_ach * 1000; | |
1264 | dev_t.cyc_iaa = (latency + 1); | |
1265 | dev_t.t_cez_r = t_cez * 1000; | |
1266 | dev_t.t_cez_w = dev_t.t_cez_r; | |
1267 | dev_t.cyc_aavdh_oe = 1; | |
1268 | dev_t.t_rdyo = t_rdyo * 1000 + min_gpmc_clk_period; | |
1269 | ||
1270 | gpmc_calc_timings(t, s, &dev_t); | |
1271 | } | |
1272 | ||
1273 | int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq, | |
1274 | int latency, | |
1275 | struct gpmc_onenand_info *info) | |
1276 | { | |
1277 | int ret; | |
1278 | struct gpmc_timings gpmc_t; | |
1279 | struct gpmc_settings gpmc_s; | |
1280 | ||
1281 | gpmc_read_settings_dt(dev->of_node, &gpmc_s); | |
1282 | ||
1283 | info->sync_read = gpmc_s.sync_read; | |
1284 | info->sync_write = gpmc_s.sync_write; | |
1285 | info->burst_len = gpmc_s.burst_len; | |
1286 | ||
1287 | if (!gpmc_s.sync_read && !gpmc_s.sync_write) | |
1288 | return 0; | |
1289 | ||
1290 | gpmc_omap_onenand_calc_sync_timings(&gpmc_t, &gpmc_s, freq, latency); | |
1291 | ||
1292 | ret = gpmc_cs_program_settings(cs, &gpmc_s); | |
1293 | if (ret < 0) | |
1294 | return ret; | |
1295 | ||
1296 | return gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); | |
1297 | } | |
1298 | EXPORT_SYMBOL_GPL(gpmc_omap_onenand_set_timings); | |
1299 | ||
1cd53458 | 1300 | int gpmc_get_client_irq(unsigned int irq_config) |
6b6c32fc | 1301 | { |
384258f2 RQ |
1302 | if (!gpmc_irq_domain) { |
1303 | pr_warn("%s called before GPMC IRQ domain available\n", | |
1304 | __func__); | |
6b6c32fc | 1305 | return 0; |
384258f2 | 1306 | } |
6b6c32fc | 1307 | |
b2bac25a RQ |
1308 | /* we restrict this to NAND IRQs only */ |
1309 | if (irq_config >= GPMC_NR_NAND_IRQS) | |
384258f2 | 1310 | return 0; |
6b6c32fc | 1311 | |
384258f2 | 1312 | return irq_create_mapping(gpmc_irq_domain, irq_config); |
6b6c32fc AM |
1313 | } |
1314 | ||
384258f2 | 1315 | static int gpmc_irq_endis(unsigned long hwirq, bool endis) |
6b6c32fc | 1316 | { |
6b6c32fc AM |
1317 | u32 regval; |
1318 | ||
b2bac25a RQ |
1319 | /* bits GPMC_NR_NAND_IRQS to 8 are reserved */ |
1320 | if (hwirq >= GPMC_NR_NAND_IRQS) | |
1321 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1322 | ||
384258f2 RQ |
1323 | regval = gpmc_read_reg(GPMC_IRQENABLE); |
1324 | if (endis) | |
1325 | regval |= BIT(hwirq); | |
1326 | else | |
1327 | regval &= ~BIT(hwirq); | |
1328 | gpmc_write_reg(GPMC_IRQENABLE, regval); | |
6b6c32fc AM |
1329 | |
1330 | return 0; | |
1331 | } | |
1332 | ||
1333 | static void gpmc_irq_disable(struct irq_data *p) | |
1334 | { | |
384258f2 | 1335 | gpmc_irq_endis(p->hwirq, false); |
6b6c32fc AM |
1336 | } |
1337 | ||
1338 | static void gpmc_irq_enable(struct irq_data *p) | |
1339 | { | |
384258f2 | 1340 | gpmc_irq_endis(p->hwirq, true); |
6b6c32fc AM |
1341 | } |
1342 | ||
b2bac25a RQ |
1343 | static void gpmc_irq_mask(struct irq_data *d) |
1344 | { | |
1345 | gpmc_irq_endis(d->hwirq, false); | |
1346 | } | |
1347 | ||
1348 | static void gpmc_irq_unmask(struct irq_data *d) | |
1349 | { | |
1350 | gpmc_irq_endis(d->hwirq, true); | |
1351 | } | |
1352 | ||
1353 | static void gpmc_irq_edge_config(unsigned long hwirq, bool rising_edge) | |
1354 | { | |
1355 | u32 regval; | |
1356 | ||
1357 | /* NAND IRQs polarity is not configurable */ | |
1358 | if (hwirq < GPMC_NR_NAND_IRQS) | |
1359 | return; | |
1360 | ||
1361 | /* WAITPIN starts at BIT 8 */ | |
1362 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1363 | ||
1364 | regval = gpmc_read_reg(GPMC_CONFIG); | |
1365 | if (rising_edge) | |
1366 | regval &= ~BIT(hwirq); | |
1367 | else | |
1368 | regval |= BIT(hwirq); | |
1369 | ||
1370 | gpmc_write_reg(GPMC_CONFIG, regval); | |
1371 | } | |
1372 | ||
1373 | static void gpmc_irq_ack(struct irq_data *d) | |
1374 | { | |
1375 | unsigned int hwirq = d->hwirq; | |
1376 | ||
1377 | /* skip reserved bits */ | |
1378 | if (hwirq >= GPMC_NR_NAND_IRQS) | |
1379 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1380 | ||
1381 | /* Setting bit to 1 clears (or Acks) the interrupt */ | |
1382 | gpmc_write_reg(GPMC_IRQSTATUS, BIT(hwirq)); | |
1383 | } | |
1384 | ||
1385 | static int gpmc_irq_set_type(struct irq_data *d, unsigned int trigger) | |
1386 | { | |
1387 | /* can't set type for NAND IRQs */ | |
1388 | if (d->hwirq < GPMC_NR_NAND_IRQS) | |
1389 | return -EINVAL; | |
1390 | ||
1391 | /* We can support either rising or falling edge at a time */ | |
1392 | if (trigger == IRQ_TYPE_EDGE_FALLING) | |
1393 | gpmc_irq_edge_config(d->hwirq, false); | |
1394 | else if (trigger == IRQ_TYPE_EDGE_RISING) | |
1395 | gpmc_irq_edge_config(d->hwirq, true); | |
1396 | else | |
1397 | return -EINVAL; | |
6b6c32fc | 1398 | |
b2bac25a RQ |
1399 | return 0; |
1400 | } | |
6b6c32fc | 1401 | |
384258f2 RQ |
1402 | static int gpmc_irq_map(struct irq_domain *d, unsigned int virq, |
1403 | irq_hw_number_t hw) | |
6b6c32fc | 1404 | { |
384258f2 RQ |
1405 | struct gpmc_device *gpmc = d->host_data; |
1406 | ||
1407 | irq_set_chip_data(virq, gpmc); | |
b2bac25a RQ |
1408 | if (hw < GPMC_NR_NAND_IRQS) { |
1409 | irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOAUTOEN); | |
1410 | irq_set_chip_and_handler(virq, &gpmc->irq_chip, | |
1411 | handle_simple_irq); | |
1412 | } else { | |
1413 | irq_set_chip_and_handler(virq, &gpmc->irq_chip, | |
1414 | handle_edge_irq); | |
1415 | } | |
384258f2 RQ |
1416 | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | static const struct irq_domain_ops gpmc_irq_domain_ops = { | |
1421 | .map = gpmc_irq_map, | |
1422 | .xlate = irq_domain_xlate_twocell, | |
1423 | }; | |
1424 | ||
1425 | static irqreturn_t gpmc_handle_irq(int irq, void *data) | |
1426 | { | |
1427 | int hwirq, virq; | |
b2bac25a | 1428 | u32 regval, regvalx; |
384258f2 | 1429 | struct gpmc_device *gpmc = data; |
6b6c32fc | 1430 | |
384258f2 | 1431 | regval = gpmc_read_reg(GPMC_IRQSTATUS); |
b2bac25a | 1432 | regvalx = regval; |
6b6c32fc | 1433 | |
384258f2 RQ |
1434 | if (!regval) |
1435 | return IRQ_NONE; | |
6b6c32fc | 1436 | |
b2bac25a RQ |
1437 | for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++) { |
1438 | /* skip reserved status bits */ | |
1439 | if (hwirq == GPMC_NR_NAND_IRQS) | |
1440 | regvalx >>= 8 - GPMC_NR_NAND_IRQS; | |
1441 | ||
1442 | if (regvalx & BIT(hwirq)) { | |
384258f2 RQ |
1443 | virq = irq_find_mapping(gpmc_irq_domain, hwirq); |
1444 | if (!virq) { | |
1445 | dev_warn(gpmc->dev, | |
1446 | "spurious irq detected hwirq %d, virq %d\n", | |
1447 | hwirq, virq); | |
1448 | } | |
1449 | ||
1450 | generic_handle_irq(virq); | |
1451 | } | |
6b6c32fc AM |
1452 | } |
1453 | ||
384258f2 RQ |
1454 | gpmc_write_reg(GPMC_IRQSTATUS, regval); |
1455 | ||
1456 | return IRQ_HANDLED; | |
1457 | } | |
1458 | ||
1459 | static int gpmc_setup_irq(struct gpmc_device *gpmc) | |
1460 | { | |
1461 | u32 regval; | |
1462 | int rc; | |
1463 | ||
6b6c32fc AM |
1464 | /* Disable interrupts */ |
1465 | gpmc_write_reg(GPMC_IRQENABLE, 0); | |
1466 | ||
1467 | /* clear interrupts */ | |
1468 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
1469 | gpmc_write_reg(GPMC_IRQSTATUS, regval); | |
1470 | ||
384258f2 | 1471 | gpmc->irq_chip.name = "gpmc"; |
384258f2 RQ |
1472 | gpmc->irq_chip.irq_enable = gpmc_irq_enable; |
1473 | gpmc->irq_chip.irq_disable = gpmc_irq_disable; | |
b2bac25a RQ |
1474 | gpmc->irq_chip.irq_ack = gpmc_irq_ack; |
1475 | gpmc->irq_chip.irq_mask = gpmc_irq_mask; | |
1476 | gpmc->irq_chip.irq_unmask = gpmc_irq_unmask; | |
1477 | gpmc->irq_chip.irq_set_type = gpmc_irq_set_type; | |
384258f2 RQ |
1478 | |
1479 | gpmc_irq_domain = irq_domain_add_linear(gpmc->dev->of_node, | |
b2bac25a | 1480 | gpmc->nirqs, |
384258f2 RQ |
1481 | &gpmc_irq_domain_ops, |
1482 | gpmc); | |
1483 | if (!gpmc_irq_domain) { | |
1484 | dev_err(gpmc->dev, "IRQ domain add failed\n"); | |
1485 | return -ENODEV; | |
1486 | } | |
1487 | ||
1488 | rc = request_irq(gpmc->irq, gpmc_handle_irq, 0, "gpmc", gpmc); | |
1489 | if (rc) { | |
1490 | dev_err(gpmc->dev, "failed to request irq %d: %d\n", | |
1491 | gpmc->irq, rc); | |
1492 | irq_domain_remove(gpmc_irq_domain); | |
1493 | gpmc_irq_domain = NULL; | |
1494 | } | |
1495 | ||
1496 | return rc; | |
6b6c32fc AM |
1497 | } |
1498 | ||
384258f2 | 1499 | static int gpmc_free_irq(struct gpmc_device *gpmc) |
da496873 | 1500 | { |
384258f2 | 1501 | int hwirq; |
da496873 | 1502 | |
384258f2 | 1503 | free_irq(gpmc->irq, gpmc); |
da496873 | 1504 | |
b2bac25a | 1505 | for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++) |
384258f2 | 1506 | irq_dispose_mapping(irq_find_mapping(gpmc_irq_domain, hwirq)); |
da496873 | 1507 | |
384258f2 RQ |
1508 | irq_domain_remove(gpmc_irq_domain); |
1509 | gpmc_irq_domain = NULL; | |
da496873 AM |
1510 | |
1511 | return 0; | |
1512 | } | |
1513 | ||
351a102d | 1514 | static void gpmc_mem_exit(void) |
da496873 AM |
1515 | { |
1516 | int cs; | |
1517 | ||
f34f3716 | 1518 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
da496873 AM |
1519 | if (!gpmc_cs_mem_enabled(cs)) |
1520 | continue; | |
1521 | gpmc_cs_delete_mem(cs); | |
1522 | } | |
da496873 AM |
1523 | } |
1524 | ||
7e58accf | 1525 | static void gpmc_mem_init(struct gpmc_device *gpmc) |
f37e4580 | 1526 | { |
84b00f0e | 1527 | int cs; |
f37e4580 | 1528 | |
7e58accf RQ |
1529 | if (!gpmc->data) { |
1530 | /* All legacy devices have same data IO window */ | |
1531 | gpmc_mem_root.start = GPMC_MEM_START; | |
1532 | gpmc_mem_root.end = GPMC_MEM_END; | |
1533 | } else { | |
1534 | gpmc_mem_root.start = gpmc->data->start; | |
1535 | gpmc_mem_root.end = gpmc->data->end; | |
1536 | } | |
f37e4580 ID |
1537 | |
1538 | /* Reserve all regions that has been set up by bootloader */ | |
f34f3716 | 1539 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
f37e4580 ID |
1540 | u32 base, size; |
1541 | ||
1542 | if (!gpmc_cs_mem_enabled(cs)) | |
1543 | continue; | |
1544 | gpmc_cs_get_memconf(cs, &base, &size); | |
84b00f0e JH |
1545 | if (gpmc_cs_insert_mem(cs, base, size)) { |
1546 | pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n", | |
1547 | __func__, cs, base, base + size); | |
1548 | gpmc_cs_disable_mem(cs); | |
8119024e | 1549 | } |
f37e4580 | 1550 | } |
4bbbc1ad JY |
1551 | } |
1552 | ||
246da26d AM |
1553 | static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk) |
1554 | { | |
1555 | u32 temp; | |
1556 | int div; | |
1557 | ||
1558 | div = gpmc_calc_divider(sync_clk); | |
1559 | temp = gpmc_ps_to_ticks(time_ps); | |
1560 | temp = (temp + div - 1) / div; | |
1561 | return gpmc_ticks_to_ps(temp * div); | |
1562 | } | |
1563 | ||
1564 | /* XXX: can the cycles be avoided ? */ | |
1565 | static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1566 | struct gpmc_device_timings *dev_t, |
1567 | bool mux) | |
246da26d | 1568 | { |
246da26d AM |
1569 | u32 temp; |
1570 | ||
1571 | /* adv_rd_off */ | |
1572 | temp = dev_t->t_avdp_r; | |
1573 | /* XXX: mux check required ? */ | |
1574 | if (mux) { | |
1575 | /* XXX: t_avdp not to be required for sync, only added for tusb | |
1576 | * this indirectly necessitates requirement of t_avdp_r and | |
1577 | * t_avdp_w instead of having a single t_avdp | |
1578 | */ | |
1579 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh); | |
1580 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1581 | } | |
1582 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1583 | ||
1584 | /* oe_on */ | |
1585 | temp = dev_t->t_oeasu; /* XXX: remove this ? */ | |
1586 | if (mux) { | |
1587 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach); | |
1588 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + | |
1589 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe)); | |
1590 | } | |
1591 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
1592 | ||
1593 | /* access */ | |
1594 | /* XXX: any scope for improvement ?, by combining oe_on | |
1595 | * and clk_activation, need to check whether | |
1596 | * access = clk_activation + round to sync clk ? | |
1597 | */ | |
1598 | temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk); | |
1599 | temp += gpmc_t->clk_activation; | |
1600 | if (dev_t->cyc_oe) | |
1601 | temp = max_t(u32, temp, gpmc_t->oe_on + | |
1602 | gpmc_ticks_to_ps(dev_t->cyc_oe)); | |
1603 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
1604 | ||
1605 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1606 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1607 | ||
1608 | /* rd_cycle */ | |
1609 | temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez); | |
1610 | temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) + | |
1611 | gpmc_t->access; | |
1612 | /* XXX: barter t_ce_rdyz with t_cez_r ? */ | |
1613 | if (dev_t->t_ce_rdyz) | |
1614 | temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz); | |
1615 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1616 | ||
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1621 | struct gpmc_device_timings *dev_t, |
1622 | bool mux) | |
246da26d | 1623 | { |
246da26d AM |
1624 | u32 temp; |
1625 | ||
1626 | /* adv_wr_off */ | |
1627 | temp = dev_t->t_avdp_w; | |
1628 | if (mux) { | |
1629 | temp = max_t(u32, temp, | |
1630 | gpmc_t->clk_activation + dev_t->t_avdh); | |
1631 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1632 | } | |
1633 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1634 | ||
1635 | /* wr_data_mux_bus */ | |
1636 | temp = max_t(u32, dev_t->t_weasu, | |
1637 | gpmc_t->clk_activation + dev_t->t_rdyo); | |
1638 | /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?, | |
1639 | * and in that case remember to handle we_on properly | |
1640 | */ | |
1641 | if (mux) { | |
1642 | temp = max_t(u32, temp, | |
1643 | gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1644 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1645 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1646 | } | |
1647 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1648 | ||
1649 | /* we_on */ | |
1650 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1651 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1652 | else | |
1653 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1654 | ||
1655 | /* wr_access */ | |
1656 | /* XXX: gpmc_capability check reqd ? , even if not, will not harm */ | |
1657 | gpmc_t->wr_access = gpmc_t->access; | |
1658 | ||
1659 | /* we_off */ | |
1660 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1661 | temp = max_t(u32, temp, | |
1662 | gpmc_t->wr_access + gpmc_ticks_to_ps(1)); | |
1663 | temp = max_t(u32, temp, | |
1664 | gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl)); | |
1665 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1666 | ||
1667 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1668 | dev_t->t_wph); | |
1669 | ||
1670 | /* wr_cycle */ | |
1671 | temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk); | |
1672 | temp += gpmc_t->wr_access; | |
1673 | /* XXX: barter t_ce_rdyz with t_cez_w ? */ | |
1674 | if (dev_t->t_ce_rdyz) | |
1675 | temp = max_t(u32, temp, | |
1676 | gpmc_t->cs_wr_off + dev_t->t_ce_rdyz); | |
1677 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1678 | ||
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1683 | struct gpmc_device_timings *dev_t, |
1684 | bool mux) | |
246da26d | 1685 | { |
246da26d AM |
1686 | u32 temp; |
1687 | ||
1688 | /* adv_rd_off */ | |
1689 | temp = dev_t->t_avdp_r; | |
1690 | if (mux) | |
1691 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1692 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1693 | ||
1694 | /* oe_on */ | |
1695 | temp = dev_t->t_oeasu; | |
1696 | if (mux) | |
cdd1aeae | 1697 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + dev_t->t_aavdh); |
246da26d AM |
1698 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); |
1699 | ||
1700 | /* access */ | |
1701 | temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */ | |
cdd1aeae KK |
1702 | gpmc_t->oe_on + dev_t->t_oe); |
1703 | temp = max_t(u32, temp, gpmc_t->cs_on + dev_t->t_ce); | |
1704 | temp = max_t(u32, temp, gpmc_t->adv_on + dev_t->t_aa); | |
246da26d AM |
1705 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); |
1706 | ||
1707 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1708 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1709 | ||
1710 | /* rd_cycle */ | |
1711 | temp = max_t(u32, dev_t->t_rd_cycle, | |
1712 | gpmc_t->cs_rd_off + dev_t->t_cez_r); | |
1713 | temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez); | |
1714 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1720 | struct gpmc_device_timings *dev_t, |
1721 | bool mux) | |
246da26d | 1722 | { |
246da26d AM |
1723 | u32 temp; |
1724 | ||
1725 | /* adv_wr_off */ | |
1726 | temp = dev_t->t_avdp_w; | |
1727 | if (mux) | |
1728 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1729 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1730 | ||
1731 | /* wr_data_mux_bus */ | |
1732 | temp = dev_t->t_weasu; | |
1733 | if (mux) { | |
1734 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1735 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1736 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1737 | } | |
1738 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1739 | ||
1740 | /* we_on */ | |
1741 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1742 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1743 | else | |
1744 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1745 | ||
1746 | /* we_off */ | |
1747 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1748 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1749 | ||
1750 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1751 | dev_t->t_wph); | |
1752 | ||
1753 | /* wr_cycle */ | |
1754 | temp = max_t(u32, dev_t->t_wr_cycle, | |
1755 | gpmc_t->cs_wr_off + dev_t->t_cez_w); | |
1756 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1757 | ||
1758 | return 0; | |
1759 | } | |
1760 | ||
1761 | static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t, | |
1762 | struct gpmc_device_timings *dev_t) | |
1763 | { | |
1764 | u32 temp; | |
1765 | ||
1766 | gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) * | |
1767 | gpmc_get_fclk_period(); | |
1768 | ||
1769 | gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk( | |
1770 | dev_t->t_bacc, | |
1771 | gpmc_t->sync_clk); | |
1772 | ||
1773 | temp = max_t(u32, dev_t->t_ces, dev_t->t_avds); | |
1774 | gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp); | |
1775 | ||
1776 | if (gpmc_calc_divider(gpmc_t->sync_clk) != 1) | |
1777 | return 0; | |
1778 | ||
1779 | if (dev_t->ce_xdelay) | |
1780 | gpmc_t->bool_timings.cs_extra_delay = true; | |
1781 | if (dev_t->avd_xdelay) | |
1782 | gpmc_t->bool_timings.adv_extra_delay = true; | |
1783 | if (dev_t->oe_xdelay) | |
1784 | gpmc_t->bool_timings.oe_extra_delay = true; | |
1785 | if (dev_t->we_xdelay) | |
1786 | gpmc_t->bool_timings.we_extra_delay = true; | |
1787 | ||
1788 | return 0; | |
1789 | } | |
1790 | ||
1791 | static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1792 | struct gpmc_device_timings *dev_t, |
1793 | bool sync) | |
246da26d AM |
1794 | { |
1795 | u32 temp; | |
1796 | ||
1797 | /* cs_on */ | |
1798 | gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu); | |
1799 | ||
1800 | /* adv_on */ | |
1801 | temp = dev_t->t_avdasu; | |
1802 | if (dev_t->t_ce_avd) | |
1803 | temp = max_t(u32, temp, | |
1804 | gpmc_t->cs_on + dev_t->t_ce_avd); | |
1805 | gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp); | |
1806 | ||
c3be5b45 | 1807 | if (sync) |
246da26d AM |
1808 | gpmc_calc_sync_common_timings(gpmc_t, dev_t); |
1809 | ||
1810 | return 0; | |
1811 | } | |
1812 | ||
1a1e7580 KK |
1813 | /* |
1814 | * TODO: remove this function once all peripherals are confirmed to | |
246da26d AM |
1815 | * work with generic timing. Simultaneously gpmc_cs_set_timings() |
1816 | * has to be modified to handle timings in ps instead of ns | |
1a1e7580 | 1817 | */ |
246da26d AM |
1818 | static void gpmc_convert_ps_to_ns(struct gpmc_timings *t) |
1819 | { | |
1820 | t->cs_on /= 1000; | |
1821 | t->cs_rd_off /= 1000; | |
1822 | t->cs_wr_off /= 1000; | |
1823 | t->adv_on /= 1000; | |
1824 | t->adv_rd_off /= 1000; | |
1825 | t->adv_wr_off /= 1000; | |
1826 | t->we_on /= 1000; | |
1827 | t->we_off /= 1000; | |
1828 | t->oe_on /= 1000; | |
1829 | t->oe_off /= 1000; | |
1830 | t->page_burst_access /= 1000; | |
1831 | t->access /= 1000; | |
1832 | t->rd_cycle /= 1000; | |
1833 | t->wr_cycle /= 1000; | |
1834 | t->bus_turnaround /= 1000; | |
1835 | t->cycle2cycle_delay /= 1000; | |
1836 | t->wait_monitoring /= 1000; | |
1837 | t->clk_activation /= 1000; | |
1838 | t->wr_access /= 1000; | |
1839 | t->wr_data_mux_bus /= 1000; | |
1840 | } | |
1841 | ||
1842 | int gpmc_calc_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1843 | struct gpmc_settings *gpmc_s, |
1844 | struct gpmc_device_timings *dev_t) | |
246da26d | 1845 | { |
c3be5b45 JH |
1846 | bool mux = false, sync = false; |
1847 | ||
1848 | if (gpmc_s) { | |
1849 | mux = gpmc_s->mux_add_data ? true : false; | |
1850 | sync = (gpmc_s->sync_read || gpmc_s->sync_write); | |
1851 | } | |
1852 | ||
246da26d AM |
1853 | memset(gpmc_t, 0, sizeof(*gpmc_t)); |
1854 | ||
c3be5b45 | 1855 | gpmc_calc_common_timings(gpmc_t, dev_t, sync); |
246da26d | 1856 | |
c3be5b45 JH |
1857 | if (gpmc_s && gpmc_s->sync_read) |
1858 | gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux); | |
246da26d | 1859 | else |
c3be5b45 | 1860 | gpmc_calc_async_read_timings(gpmc_t, dev_t, mux); |
246da26d | 1861 | |
c3be5b45 JH |
1862 | if (gpmc_s && gpmc_s->sync_write) |
1863 | gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux); | |
246da26d | 1864 | else |
c3be5b45 | 1865 | gpmc_calc_async_write_timings(gpmc_t, dev_t, mux); |
246da26d AM |
1866 | |
1867 | /* TODO: remove, see function definition */ | |
1868 | gpmc_convert_ps_to_ns(gpmc_t); | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
aa8d4767 JH |
1873 | /** |
1874 | * gpmc_cs_program_settings - programs non-timing related settings | |
1875 | * @cs: GPMC chip-select to program | |
1876 | * @p: pointer to GPMC settings structure | |
1877 | * | |
1878 | * Programs non-timing related settings for a GPMC chip-select, such as | |
1879 | * bus-width, burst configuration, etc. Function should be called once | |
1880 | * for each chip-select that is being used and must be called before | |
1881 | * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1 | |
1882 | * register will be initialised to zero by this function. Returns 0 on | |
1883 | * success and appropriate negative error code on failure. | |
1884 | */ | |
1885 | int gpmc_cs_program_settings(int cs, struct gpmc_settings *p) | |
1886 | { | |
1887 | u32 config1; | |
1888 | ||
1889 | if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) { | |
1890 | pr_err("%s: invalid width %d!", __func__, p->device_width); | |
1891 | return -EINVAL; | |
1892 | } | |
1893 | ||
1894 | /* Address-data multiplexing not supported for NAND devices */ | |
1895 | if (p->device_nand && p->mux_add_data) { | |
1896 | pr_err("%s: invalid configuration!\n", __func__); | |
1897 | return -EINVAL; | |
1898 | } | |
1899 | ||
1900 | if ((p->mux_add_data > GPMC_MUX_AD) || | |
1901 | ((p->mux_add_data == GPMC_MUX_AAD) && | |
1902 | !(gpmc_capability & GPMC_HAS_MUX_AAD))) { | |
1903 | pr_err("%s: invalid multiplex configuration!\n", __func__); | |
1904 | return -EINVAL; | |
1905 | } | |
1906 | ||
1907 | /* Page/burst mode supports lengths of 4, 8 and 16 bytes */ | |
1908 | if (p->burst_read || p->burst_write) { | |
1909 | switch (p->burst_len) { | |
1910 | case GPMC_BURST_4: | |
1911 | case GPMC_BURST_8: | |
1912 | case GPMC_BURST_16: | |
1913 | break; | |
1914 | default: | |
1915 | pr_err("%s: invalid page/burst-length (%d)\n", | |
1916 | __func__, p->burst_len); | |
1917 | return -EINVAL; | |
1918 | } | |
1919 | } | |
1920 | ||
827e0920 BN |
1921 | if (p->wait_pin != GPMC_WAITPIN_INVALID && |
1922 | p->wait_pin > gpmc_nr_waitpins) { | |
aa8d4767 JH |
1923 | pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin); |
1924 | return -EINVAL; | |
1925 | } | |
1926 | ||
1927 | config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1)); | |
1928 | ||
1929 | if (p->sync_read) | |
1930 | config1 |= GPMC_CONFIG1_READTYPE_SYNC; | |
1931 | if (p->sync_write) | |
1932 | config1 |= GPMC_CONFIG1_WRITETYPE_SYNC; | |
1933 | if (p->wait_on_read) | |
1934 | config1 |= GPMC_CONFIG1_WAIT_READ_MON; | |
1935 | if (p->wait_on_write) | |
1936 | config1 |= GPMC_CONFIG1_WAIT_WRITE_MON; | |
1937 | if (p->wait_on_read || p->wait_on_write) | |
1938 | config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin); | |
1939 | if (p->device_nand) | |
1940 | config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND); | |
1941 | if (p->mux_add_data) | |
1942 | config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data); | |
1943 | if (p->burst_read) | |
1944 | config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP; | |
1945 | if (p->burst_write) | |
1946 | config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP; | |
1947 | if (p->burst_read || p->burst_write) { | |
1948 | config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3); | |
1949 | config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0; | |
1950 | } | |
1951 | ||
1952 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1); | |
1953 | ||
89aed3cd BN |
1954 | if (p->wait_pin_polarity != GPMC_WAITPINPOLARITY_INVALID) { |
1955 | config1 = gpmc_read_reg(GPMC_CONFIG); | |
1956 | ||
1957 | if (p->wait_pin_polarity == GPMC_WAITPINPOLARITY_ACTIVE_LOW) | |
1958 | config1 &= ~GPMC_CONFIG_WAITPINPOLARITY(p->wait_pin); | |
1959 | else if (p->wait_pin_polarity == GPMC_WAITPINPOLARITY_ACTIVE_HIGH) | |
1960 | config1 |= GPMC_CONFIG_WAITPINPOLARITY(p->wait_pin); | |
1961 | ||
1962 | gpmc_write_reg(GPMC_CONFIG, config1); | |
1963 | } | |
1964 | ||
aa8d4767 JH |
1965 | return 0; |
1966 | } | |
1967 | ||
bc6b1e7b | 1968 | #ifdef CONFIG_OF |
6cf238d4 Y |
1969 | static void gpmc_cs_set_name(int cs, const char *name) |
1970 | { | |
1971 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
1972 | ||
1973 | gpmc->name = name; | |
1974 | } | |
1975 | ||
1976 | static const char *gpmc_cs_get_name(int cs) | |
1977 | { | |
1978 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
1979 | ||
1980 | return gpmc->name; | |
1981 | } | |
1982 | ||
1983 | /** | |
1984 | * gpmc_cs_remap - remaps a chip-select physical base address | |
1985 | * @cs: chip-select to remap | |
1986 | * @base: physical base address to re-map chip-select to | |
1987 | * | |
1988 | * Re-maps a chip-select to a new physical base address specified by | |
1989 | * "base". Returns 0 on success and appropriate negative error code | |
1990 | * on failure. | |
1991 | */ | |
1992 | static int gpmc_cs_remap(int cs, u32 base) | |
1993 | { | |
1994 | int ret; | |
1995 | u32 old_base, size; | |
1996 | ||
1997 | if (cs >= gpmc_cs_num) { | |
1998 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
1999 | return -ENODEV; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Make sure we ignore any device offsets from the GPMC partition | |
2004 | * allocated for the chip select and that the new base confirms | |
2005 | * to the GPMC 16MB minimum granularity. | |
2006 | */ | |
2007 | base &= ~(SZ_16M - 1); | |
2008 | ||
2009 | gpmc_cs_get_memconf(cs, &old_base, &size); | |
2010 | if (base == old_base) | |
2011 | return 0; | |
2012 | ||
2013 | ret = gpmc_cs_delete_mem(cs); | |
2014 | if (ret < 0) | |
2015 | return ret; | |
2016 | ||
2017 | ret = gpmc_cs_insert_mem(cs, base, size); | |
2018 | if (ret < 0) | |
2019 | return ret; | |
2020 | ||
2021 | ret = gpmc_cs_set_memconf(cs, base, size); | |
2022 | ||
2023 | return ret; | |
2024 | } | |
2025 | ||
8c8a7771 JH |
2026 | /** |
2027 | * gpmc_read_settings_dt - read gpmc settings from device-tree | |
2028 | * @np: pointer to device-tree node for a gpmc child device | |
2029 | * @p: pointer to gpmc settings structure | |
2030 | * | |
2031 | * Reads the GPMC settings for a GPMC child device from device-tree and | |
2032 | * stores them in the GPMC settings structure passed. The GPMC settings | |
2033 | * structure is initialised to zero by this function and so any | |
2034 | * previously stored settings will be cleared. | |
2035 | */ | |
2036 | void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) | |
2037 | { | |
2038 | memset(p, 0, sizeof(struct gpmc_settings)); | |
2039 | ||
2040 | p->sync_read = of_property_read_bool(np, "gpmc,sync-read"); | |
2041 | p->sync_write = of_property_read_bool(np, "gpmc,sync-write"); | |
8c8a7771 JH |
2042 | of_property_read_u32(np, "gpmc,device-width", &p->device_width); |
2043 | of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); | |
2044 | ||
2045 | if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { | |
2046 | p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap"); | |
2047 | p->burst_read = of_property_read_bool(np, "gpmc,burst-read"); | |
2048 | p->burst_write = of_property_read_bool(np, "gpmc,burst-write"); | |
2049 | if (!p->burst_read && !p->burst_write) | |
2050 | pr_warn("%s: page/burst-length set but not used!\n", | |
2051 | __func__); | |
2052 | } | |
2053 | ||
89aed3cd BN |
2054 | p->wait_pin = GPMC_WAITPIN_INVALID; |
2055 | p->wait_pin_polarity = GPMC_WAITPINPOLARITY_INVALID; | |
2056 | ||
8c8a7771 | 2057 | if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { |
89aed3cd BN |
2058 | if (!gpmc_is_valid_waitpin(p->wait_pin)) { |
2059 | pr_err("%s: Invalid wait-pin (%d)\n", __func__, p->wait_pin); | |
2060 | p->wait_pin = GPMC_WAITPIN_INVALID; | |
2061 | } | |
2062 | ||
2063 | if (!of_property_read_u32(np, "ti,wait-pin-polarity", | |
2064 | &p->wait_pin_polarity)) { | |
2065 | if (p->wait_pin_polarity != GPMC_WAITPINPOLARITY_ACTIVE_HIGH && | |
2066 | p->wait_pin_polarity != GPMC_WAITPINPOLARITY_ACTIVE_LOW) { | |
2067 | pr_err("%s: Invalid wait-pin-polarity (%d)\n", | |
2068 | __func__, p->wait_pin_polarity); | |
2069 | p->wait_pin_polarity = GPMC_WAITPINPOLARITY_INVALID; | |
2070 | } | |
2071 | } | |
2072 | ||
8c8a7771 JH |
2073 | p->wait_on_read = of_property_read_bool(np, |
2074 | "gpmc,wait-on-read"); | |
2075 | p->wait_on_write = of_property_read_bool(np, | |
2076 | "gpmc,wait-on-write"); | |
2077 | if (!p->wait_on_read && !p->wait_on_write) | |
2b54057c RQ |
2078 | pr_debug("%s: rd/wr wait monitoring not enabled!\n", |
2079 | __func__); | |
8c8a7771 JH |
2080 | } |
2081 | } | |
2082 | ||
bc6b1e7b DM |
2083 | static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, |
2084 | struct gpmc_timings *gpmc_t) | |
2085 | { | |
d36b4cd4 JH |
2086 | struct gpmc_bool_timings *p; |
2087 | ||
2088 | if (!np || !gpmc_t) | |
2089 | return; | |
bc6b1e7b DM |
2090 | |
2091 | memset(gpmc_t, 0, sizeof(*gpmc_t)); | |
2092 | ||
2093 | /* minimum clock period for syncronous mode */ | |
d36b4cd4 | 2094 | of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk); |
bc6b1e7b DM |
2095 | |
2096 | /* chip select timtings */ | |
d36b4cd4 JH |
2097 | of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on); |
2098 | of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off); | |
2099 | of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off); | |
bc6b1e7b DM |
2100 | |
2101 | /* ADV signal timings */ | |
d36b4cd4 JH |
2102 | of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on); |
2103 | of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off); | |
2104 | of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off); | |
2c92c04b NA |
2105 | of_property_read_u32(np, "gpmc,adv-aad-mux-on-ns", |
2106 | &gpmc_t->adv_aad_mux_on); | |
2107 | of_property_read_u32(np, "gpmc,adv-aad-mux-rd-off-ns", | |
2108 | &gpmc_t->adv_aad_mux_rd_off); | |
2109 | of_property_read_u32(np, "gpmc,adv-aad-mux-wr-off-ns", | |
2110 | &gpmc_t->adv_aad_mux_wr_off); | |
bc6b1e7b DM |
2111 | |
2112 | /* WE signal timings */ | |
d36b4cd4 JH |
2113 | of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on); |
2114 | of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off); | |
bc6b1e7b DM |
2115 | |
2116 | /* OE signal timings */ | |
d36b4cd4 JH |
2117 | of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on); |
2118 | of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off); | |
2c92c04b NA |
2119 | of_property_read_u32(np, "gpmc,oe-aad-mux-on-ns", |
2120 | &gpmc_t->oe_aad_mux_on); | |
2121 | of_property_read_u32(np, "gpmc,oe-aad-mux-off-ns", | |
2122 | &gpmc_t->oe_aad_mux_off); | |
bc6b1e7b DM |
2123 | |
2124 | /* access and cycle timings */ | |
d36b4cd4 JH |
2125 | of_property_read_u32(np, "gpmc,page-burst-access-ns", |
2126 | &gpmc_t->page_burst_access); | |
2127 | of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access); | |
2128 | of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle); | |
2129 | of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle); | |
2130 | of_property_read_u32(np, "gpmc,bus-turnaround-ns", | |
2131 | &gpmc_t->bus_turnaround); | |
2132 | of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns", | |
2133 | &gpmc_t->cycle2cycle_delay); | |
2134 | of_property_read_u32(np, "gpmc,wait-monitoring-ns", | |
2135 | &gpmc_t->wait_monitoring); | |
2136 | of_property_read_u32(np, "gpmc,clk-activation-ns", | |
2137 | &gpmc_t->clk_activation); | |
2138 | ||
2139 | /* only applicable to OMAP3+ */ | |
2140 | of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access); | |
2141 | of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns", | |
2142 | &gpmc_t->wr_data_mux_bus); | |
2143 | ||
2144 | /* bool timing parameters */ | |
2145 | p = &gpmc_t->bool_timings; | |
2146 | ||
2147 | p->cycle2cyclediffcsen = | |
2148 | of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen"); | |
2149 | p->cycle2cyclesamecsen = | |
2150 | of_property_read_bool(np, "gpmc,cycle2cycle-samecsen"); | |
2151 | p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay"); | |
2152 | p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay"); | |
2153 | p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay"); | |
2154 | p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay"); | |
2155 | p->time_para_granularity = | |
2156 | of_property_read_bool(np, "gpmc,time-para-granularity"); | |
bc6b1e7b DM |
2157 | } |
2158 | ||
cdd6928c | 2159 | /** |
3af91cf7 | 2160 | * gpmc_probe_generic_child - configures the gpmc for a child device |
cdd6928c | 2161 | * @pdev: pointer to gpmc platform device |
3af91cf7 | 2162 | * @child: pointer to device-tree node for child device |
cdd6928c | 2163 | * |
3af91cf7 | 2164 | * Allocates and configures a GPMC chip-select for a child device. |
cdd6928c JH |
2165 | * Returns 0 on success and appropriate negative error code on failure. |
2166 | */ | |
3af91cf7 | 2167 | static int gpmc_probe_generic_child(struct platform_device *pdev, |
cdd6928c JH |
2168 | struct device_node *child) |
2169 | { | |
2170 | struct gpmc_settings gpmc_s; | |
2171 | struct gpmc_timings gpmc_t; | |
2172 | struct resource res; | |
2173 | unsigned long base; | |
9ed7a776 | 2174 | const char *name; |
cdd6928c | 2175 | int ret, cs; |
e378d22b | 2176 | u32 val; |
210325f0 | 2177 | struct gpmc_device *gpmc = platform_get_drvdata(pdev); |
cdd6928c JH |
2178 | |
2179 | if (of_property_read_u32(child, "reg", &cs) < 0) { | |
db749d17 RH |
2180 | dev_err(&pdev->dev, "%pOF has no 'reg' property\n", |
2181 | child); | |
cdd6928c JH |
2182 | return -ENODEV; |
2183 | } | |
2184 | ||
2185 | if (of_address_to_resource(child, 0, &res) < 0) { | |
db749d17 RH |
2186 | dev_err(&pdev->dev, "%pOF has malformed 'reg' property\n", |
2187 | child); | |
cdd6928c JH |
2188 | return -ENODEV; |
2189 | } | |
2190 | ||
9ed7a776 TL |
2191 | /* |
2192 | * Check if we have multiple instances of the same device | |
2193 | * on a single chip select. If so, use the already initialized | |
2194 | * timings. | |
2195 | */ | |
2196 | name = gpmc_cs_get_name(cs); | |
c2ade654 | 2197 | if (name && of_node_name_eq(child, name)) |
d507178f | 2198 | goto no_timings; |
9ed7a776 | 2199 | |
cdd6928c JH |
2200 | ret = gpmc_cs_request(cs, resource_size(&res), &base); |
2201 | if (ret < 0) { | |
2202 | dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); | |
2203 | return ret; | |
2204 | } | |
c2ade654 | 2205 | gpmc_cs_set_name(cs, child->full_name); |
cdd6928c | 2206 | |
35ac051e TL |
2207 | gpmc_read_settings_dt(child, &gpmc_s); |
2208 | gpmc_read_timings_dt(child, &gpmc_t); | |
cdd6928c | 2209 | |
fd4446f2 TL |
2210 | /* |
2211 | * For some GPMC devices we still need to rely on the bootloader | |
35ac051e TL |
2212 | * timings because the devices can be connected via FPGA. |
2213 | * REVISIT: Add timing support from slls644g.pdf. | |
fd4446f2 | 2214 | */ |
35ac051e TL |
2215 | if (!gpmc_t.cs_rd_off) { |
2216 | WARN(1, "enable GPMC debug to configure .dts timings for CS%i\n", | |
2217 | cs); | |
2218 | gpmc_cs_show_timings(cs, | |
2219 | "please add GPMC bootloader timings to .dts"); | |
fd4446f2 TL |
2220 | goto no_timings; |
2221 | } | |
2222 | ||
4cf27d2e RQ |
2223 | /* CS must be disabled while making changes to gpmc configuration */ |
2224 | gpmc_cs_disable_mem(cs); | |
2225 | ||
cdd6928c | 2226 | /* |
858432c7 | 2227 | * FIXME: gpmc_cs_request() will map the CS to an arbitrary |
cdd6928c JH |
2228 | * location in the gpmc address space. When booting with |
2229 | * device-tree we want the NOR flash to be mapped to the | |
2230 | * location specified in the device-tree blob. So remap the | |
2231 | * CS to this location. Once DT migration is complete should | |
2232 | * just make gpmc_cs_request() map a specific address. | |
2233 | */ | |
2234 | ret = gpmc_cs_remap(cs, res.start); | |
2235 | if (ret < 0) { | |
f70bf2a3 FE |
2236 | dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n", |
2237 | cs, &res.start); | |
bdd7e033 RQ |
2238 | if (res.start < GPMC_MEM_START) { |
2239 | dev_info(&pdev->dev, | |
2240 | "GPMC CS %d start cannot be lesser than 0x%x\n", | |
2241 | cs, GPMC_MEM_START); | |
2242 | } else if (res.end > GPMC_MEM_END) { | |
2243 | dev_info(&pdev->dev, | |
2244 | "GPMC CS %d end cannot be greater than 0x%x\n", | |
2245 | cs, GPMC_MEM_END); | |
2246 | } | |
cdd6928c JH |
2247 | goto err; |
2248 | } | |
2249 | ||
c2ade654 | 2250 | if (of_node_name_eq(child, "nand")) { |
c9711ec5 RQ |
2251 | /* Warn about older DT blobs with no compatible property */ |
2252 | if (!of_property_read_bool(child, "compatible")) { | |
2253 | dev_warn(&pdev->dev, | |
2254 | "Incompatible NAND node: missing compatible"); | |
2255 | ret = -EINVAL; | |
2256 | goto err; | |
2257 | } | |
2258 | } | |
2259 | ||
c2ade654 | 2260 | if (of_node_name_eq(child, "onenand")) { |
a758f50f LM |
2261 | /* Warn about older DT blobs with no compatible property */ |
2262 | if (!of_property_read_bool(child, "compatible")) { | |
2263 | dev_warn(&pdev->dev, | |
2264 | "Incompatible OneNAND node: missing compatible"); | |
2265 | ret = -EINVAL; | |
2266 | goto err; | |
2267 | } | |
2268 | } | |
2269 | ||
f2f8115f | 2270 | if (of_match_node(omap_nand_ids, child)) { |
c9711ec5 | 2271 | /* NAND specific setup */ |
f679888f BB |
2272 | val = 8; |
2273 | of_property_read_u32(child, "nand-bus-width", &val); | |
c9711ec5 RQ |
2274 | switch (val) { |
2275 | case 8: | |
2276 | gpmc_s.device_width = GPMC_DEVWIDTH_8BIT; | |
2277 | break; | |
2278 | case 16: | |
2279 | gpmc_s.device_width = GPMC_DEVWIDTH_16BIT; | |
2280 | break; | |
2281 | default: | |
c86f9854 RH |
2282 | dev_err(&pdev->dev, "%pOFn: invalid 'nand-bus-width'\n", |
2283 | child); | |
c9711ec5 RQ |
2284 | ret = -EINVAL; |
2285 | goto err; | |
2286 | } | |
2287 | ||
2288 | /* disable write protect */ | |
2289 | gpmc_configure(GPMC_CONFIG_WP, 0); | |
2290 | gpmc_s.device_nand = true; | |
2291 | } else { | |
2292 | ret = of_property_read_u32(child, "bank-width", | |
2293 | &gpmc_s.device_width); | |
c18a7ac3 LM |
2294 | if (ret < 0 && !gpmc_s.device_width) { |
2295 | dev_err(&pdev->dev, | |
2296 | "%pOF has no 'gpmc,device-width' property\n", | |
db749d17 | 2297 | child); |
c9711ec5 | 2298 | goto err; |
c9eabf40 | 2299 | } |
c9711ec5 | 2300 | } |
cdd6928c | 2301 | |
210325f0 RQ |
2302 | /* Reserve wait pin if it is required and valid */ |
2303 | if (gpmc_s.wait_on_read || gpmc_s.wait_on_write) { | |
89aed3cd BN |
2304 | ret = gpmc_alloc_waitpin(gpmc, &gpmc_s); |
2305 | if (ret < 0) | |
210325f0 | 2306 | goto err; |
210325f0 RQ |
2307 | } |
2308 | ||
fd820a1e | 2309 | gpmc_cs_show_timings(cs, "before gpmc_cs_program_settings"); |
210325f0 | 2310 | |
cdd6928c JH |
2311 | ret = gpmc_cs_program_settings(cs, &gpmc_s); |
2312 | if (ret < 0) | |
210325f0 | 2313 | goto err_cs; |
cdd6928c | 2314 | |
2e676901 | 2315 | ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); |
7604baf3 | 2316 | if (ret) { |
c86f9854 RH |
2317 | dev_err(&pdev->dev, "failed to set gpmc timings for: %pOFn\n", |
2318 | child); | |
210325f0 | 2319 | goto err_cs; |
7604baf3 | 2320 | } |
cdd6928c | 2321 | |
e378d22b RQ |
2322 | /* Clear limited address i.e. enable A26-A11 */ |
2323 | val = gpmc_read_reg(GPMC_CONFIG); | |
2324 | val &= ~GPMC_CONFIG_LIMITEDADDRESS; | |
2325 | gpmc_write_reg(GPMC_CONFIG, val); | |
2326 | ||
4cf27d2e RQ |
2327 | /* Enable CS region */ |
2328 | gpmc_cs_enable_mem(cs); | |
cdd6928c | 2329 | |
fd4446f2 | 2330 | no_timings: |
b1dc1ca9 RA |
2331 | |
2332 | /* create platform device, NULL on error or when disabled */ | |
2333 | if (!of_platform_device_create(child, NULL, &pdev->dev)) | |
2334 | goto err_child_fail; | |
2335 | ||
854fd920 RQ |
2336 | /* create children and other common bus children */ |
2337 | if (of_platform_default_populate(child, NULL, &pdev->dev)) | |
2338 | goto err_child_fail; | |
b1dc1ca9 RA |
2339 | |
2340 | return 0; | |
2341 | ||
2342 | err_child_fail: | |
cdd6928c | 2343 | |
c86f9854 | 2344 | dev_err(&pdev->dev, "failed to create gpmc child %pOFn\n", child); |
e8ffd6fd | 2345 | ret = -ENODEV; |
cdd6928c | 2346 | |
210325f0 | 2347 | err_cs: |
89aed3cd | 2348 | gpmc_free_waitpin(gpmc, gpmc_s.wait_pin); |
cdd6928c JH |
2349 | err: |
2350 | gpmc_cs_free(cs); | |
2351 | ||
2352 | return ret; | |
2353 | } | |
2354 | ||
854fd920 RQ |
2355 | static const struct of_device_id gpmc_dt_ids[]; |
2356 | ||
bc6b1e7b DM |
2357 | static int gpmc_probe_dt(struct platform_device *pdev) |
2358 | { | |
2359 | int ret; | |
bc6b1e7b DM |
2360 | const struct of_device_id *of_id = |
2361 | of_match_device(gpmc_dt_ids, &pdev->dev); | |
2362 | ||
2363 | if (!of_id) | |
2364 | return 0; | |
2365 | ||
f34f3716 GP |
2366 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs", |
2367 | &gpmc_cs_num); | |
2368 | if (ret < 0) { | |
2369 | pr_err("%s: number of chip-selects not defined\n", __func__); | |
2370 | return ret; | |
2371 | } else if (gpmc_cs_num < 1) { | |
2372 | pr_err("%s: all chip-selects are disabled\n", __func__); | |
2373 | return -EINVAL; | |
2374 | } else if (gpmc_cs_num > GPMC_CS_NUM) { | |
2375 | pr_err("%s: number of supported chip-selects cannot be > %d\n", | |
2376 | __func__, GPMC_CS_NUM); | |
2377 | return -EINVAL; | |
2378 | } | |
2379 | ||
9f833156 JH |
2380 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins", |
2381 | &gpmc_nr_waitpins); | |
2382 | if (ret < 0) { | |
2383 | pr_err("%s: number of wait pins not found!\n", __func__); | |
2384 | return ret; | |
2385 | } | |
2386 | ||
d2d00862 RQ |
2387 | return 0; |
2388 | } | |
2389 | ||
23540d6e | 2390 | static void gpmc_probe_dt_children(struct platform_device *pdev) |
d2d00862 RQ |
2391 | { |
2392 | int ret; | |
2393 | struct device_node *child; | |
2394 | ||
68e2eb53 | 2395 | for_each_available_child_of_node(pdev->dev.of_node, child) { |
a758f50f | 2396 | ret = gpmc_probe_generic_child(pdev, child); |
23540d6e | 2397 | if (ret) { |
c86f9854 RH |
2398 | dev_err(&pdev->dev, "failed to probe DT child '%pOFn': %d\n", |
2399 | child, ret); | |
23540d6e | 2400 | } |
5330dc16 | 2401 | } |
bc6b1e7b DM |
2402 | } |
2403 | #else | |
13d029ee Y |
2404 | void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) |
2405 | { | |
2406 | memset(p, 0, sizeof(*p)); | |
2407 | } | |
bc6b1e7b DM |
2408 | static int gpmc_probe_dt(struct platform_device *pdev) |
2409 | { | |
2410 | return 0; | |
2411 | } | |
d2d00862 | 2412 | |
23540d6e | 2413 | static void gpmc_probe_dt_children(struct platform_device *pdev) |
d2d00862 | 2414 | { |
d2d00862 | 2415 | } |
32dd625a RQ |
2416 | #endif /* CONFIG_OF */ |
2417 | ||
2418 | static int gpmc_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) | |
2419 | { | |
2420 | return 1; /* we're input only */ | |
2421 | } | |
2422 | ||
2423 | static int gpmc_gpio_direction_input(struct gpio_chip *chip, | |
2424 | unsigned int offset) | |
2425 | { | |
2426 | return 0; /* we're input only */ | |
2427 | } | |
2428 | ||
2429 | static int gpmc_gpio_direction_output(struct gpio_chip *chip, | |
2430 | unsigned int offset, int value) | |
2431 | { | |
2432 | return -EINVAL; /* we're input only */ | |
2433 | } | |
2434 | ||
2435 | static void gpmc_gpio_set(struct gpio_chip *chip, unsigned int offset, | |
2436 | int value) | |
2437 | { | |
2438 | } | |
2439 | ||
2440 | static int gpmc_gpio_get(struct gpio_chip *chip, unsigned int offset) | |
2441 | { | |
2442 | u32 reg; | |
2443 | ||
2444 | offset += 8; | |
2445 | ||
2446 | reg = gpmc_read_reg(GPMC_STATUS) & BIT(offset); | |
2447 | ||
2448 | return !!reg; | |
2449 | } | |
2450 | ||
2451 | static int gpmc_gpio_init(struct gpmc_device *gpmc) | |
2452 | { | |
2453 | int ret; | |
2454 | ||
2455 | gpmc->gpio_chip.parent = gpmc->dev; | |
2456 | gpmc->gpio_chip.owner = THIS_MODULE; | |
2457 | gpmc->gpio_chip.label = DEVICE_NAME; | |
2458 | gpmc->gpio_chip.ngpio = gpmc_nr_waitpins; | |
2459 | gpmc->gpio_chip.get_direction = gpmc_gpio_get_direction; | |
2460 | gpmc->gpio_chip.direction_input = gpmc_gpio_direction_input; | |
2461 | gpmc->gpio_chip.direction_output = gpmc_gpio_direction_output; | |
2462 | gpmc->gpio_chip.set = gpmc_gpio_set; | |
2463 | gpmc->gpio_chip.get = gpmc_gpio_get; | |
2464 | gpmc->gpio_chip.base = -1; | |
2465 | ||
525fe43f | 2466 | ret = devm_gpiochip_add_data(gpmc->dev, &gpmc->gpio_chip, NULL); |
32dd625a RQ |
2467 | if (ret < 0) { |
2468 | dev_err(gpmc->dev, "could not register gpio chip: %d\n", ret); | |
2469 | return ret; | |
2470 | } | |
2471 | ||
2472 | return 0; | |
2473 | } | |
2474 | ||
77ed5e9d TL |
2475 | static void omap3_gpmc_save_context(struct gpmc_device *gpmc) |
2476 | { | |
2477 | struct omap3_gpmc_regs *gpmc_context; | |
2478 | int i; | |
2479 | ||
2480 | if (!gpmc || !gpmc_base) | |
2481 | return; | |
2482 | ||
2483 | gpmc_context = &gpmc->context; | |
2484 | ||
2485 | gpmc_context->sysconfig = gpmc_read_reg(GPMC_SYSCONFIG); | |
2486 | gpmc_context->irqenable = gpmc_read_reg(GPMC_IRQENABLE); | |
2487 | gpmc_context->timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL); | |
2488 | gpmc_context->config = gpmc_read_reg(GPMC_CONFIG); | |
2489 | gpmc_context->prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1); | |
2490 | gpmc_context->prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2); | |
2491 | gpmc_context->prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL); | |
2492 | for (i = 0; i < gpmc_cs_num; i++) { | |
2493 | gpmc_context->cs_context[i].is_valid = gpmc_cs_mem_enabled(i); | |
2494 | if (gpmc_context->cs_context[i].is_valid) { | |
2495 | gpmc_context->cs_context[i].config1 = | |
2496 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG1); | |
2497 | gpmc_context->cs_context[i].config2 = | |
2498 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG2); | |
2499 | gpmc_context->cs_context[i].config3 = | |
2500 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG3); | |
2501 | gpmc_context->cs_context[i].config4 = | |
2502 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG4); | |
2503 | gpmc_context->cs_context[i].config5 = | |
2504 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG5); | |
2505 | gpmc_context->cs_context[i].config6 = | |
2506 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG6); | |
2507 | gpmc_context->cs_context[i].config7 = | |
2508 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG7); | |
2509 | } | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | static void omap3_gpmc_restore_context(struct gpmc_device *gpmc) | |
2514 | { | |
2515 | struct omap3_gpmc_regs *gpmc_context; | |
2516 | int i; | |
2517 | ||
2518 | if (!gpmc || !gpmc_base) | |
2519 | return; | |
2520 | ||
2521 | gpmc_context = &gpmc->context; | |
2522 | ||
2523 | gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context->sysconfig); | |
2524 | gpmc_write_reg(GPMC_IRQENABLE, gpmc_context->irqenable); | |
2525 | gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context->timeout_ctrl); | |
2526 | gpmc_write_reg(GPMC_CONFIG, gpmc_context->config); | |
2527 | gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context->prefetch_config1); | |
2528 | gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context->prefetch_config2); | |
2529 | gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context->prefetch_control); | |
2530 | for (i = 0; i < gpmc_cs_num; i++) { | |
2531 | if (gpmc_context->cs_context[i].is_valid) { | |
2532 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG1, | |
2533 | gpmc_context->cs_context[i].config1); | |
2534 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG2, | |
2535 | gpmc_context->cs_context[i].config2); | |
2536 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG3, | |
2537 | gpmc_context->cs_context[i].config3); | |
2538 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG4, | |
2539 | gpmc_context->cs_context[i].config4); | |
2540 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG5, | |
2541 | gpmc_context->cs_context[i].config5); | |
2542 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG6, | |
2543 | gpmc_context->cs_context[i].config6); | |
2544 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, | |
2545 | gpmc_context->cs_context[i].config7); | |
2546 | } else { | |
2547 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, 0); | |
2548 | } | |
2549 | } | |
2550 | } | |
2551 | ||
2552 | static int omap_gpmc_context_notifier(struct notifier_block *nb, | |
2553 | unsigned long cmd, void *v) | |
2554 | { | |
2555 | struct gpmc_device *gpmc; | |
2556 | ||
2557 | gpmc = container_of(nb, struct gpmc_device, nb); | |
2558 | if (gpmc->is_suspended || pm_runtime_suspended(gpmc->dev)) | |
2559 | return NOTIFY_OK; | |
2560 | ||
2561 | switch (cmd) { | |
2562 | case CPU_CLUSTER_PM_ENTER: | |
2563 | omap3_gpmc_save_context(gpmc); | |
2564 | break; | |
2565 | case CPU_CLUSTER_PM_ENTER_FAILED: /* No need to restore context */ | |
2566 | break; | |
2567 | case CPU_CLUSTER_PM_EXIT: | |
2568 | omap3_gpmc_restore_context(gpmc); | |
2569 | break; | |
2570 | } | |
2571 | ||
2572 | return NOTIFY_OK; | |
2573 | } | |
2574 | ||
351a102d | 2575 | static int gpmc_probe(struct platform_device *pdev) |
4bbbc1ad | 2576 | { |
89aed3cd | 2577 | int rc, i; |
6b6c32fc | 2578 | u32 l; |
da496873 | 2579 | struct resource *res; |
384258f2 RQ |
2580 | struct gpmc_device *gpmc; |
2581 | ||
2582 | gpmc = devm_kzalloc(&pdev->dev, sizeof(*gpmc), GFP_KERNEL); | |
2583 | if (!gpmc) | |
2584 | return -ENOMEM; | |
2585 | ||
2586 | gpmc->dev = &pdev->dev; | |
2587 | platform_set_drvdata(pdev, gpmc); | |
4bbbc1ad | 2588 | |
7e58accf RQ |
2589 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg"); |
2590 | if (!res) { | |
2591 | /* legacy DT */ | |
2592 | gpmc_base = devm_platform_ioremap_resource(pdev, 0); | |
2593 | if (IS_ERR(gpmc_base)) | |
2594 | return PTR_ERR(gpmc_base); | |
2595 | } else { | |
2596 | gpmc_base = devm_ioremap_resource(&pdev->dev, res); | |
2597 | if (IS_ERR(gpmc_base)) | |
2598 | return PTR_ERR(gpmc_base); | |
2599 | ||
2600 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "data"); | |
2601 | if (!res) { | |
2602 | dev_err(&pdev->dev, "couldn't get data reg resource\n"); | |
2603 | return -ENOENT; | |
2604 | } | |
8d08436d | 2605 | |
7e58accf RQ |
2606 | gpmc->data = res; |
2607 | } | |
da496873 | 2608 | |
19d398dc LP |
2609 | gpmc->irq = platform_get_irq(pdev, 0); |
2610 | if (gpmc->irq < 0) | |
2611 | return gpmc->irq; | |
da496873 | 2612 | |
8bf9be56 | 2613 | gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck"); |
da496873 | 2614 | if (IS_ERR(gpmc_l3_clk)) { |
8bf9be56 | 2615 | dev_err(&pdev->dev, "Failed to get GPMC fck\n"); |
da496873 | 2616 | return PTR_ERR(gpmc_l3_clk); |
fd1dc87d PW |
2617 | } |
2618 | ||
8bf9be56 RQ |
2619 | if (!clk_get_rate(gpmc_l3_clk)) { |
2620 | dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n"); | |
2621 | return -EINVAL; | |
2622 | } | |
2623 | ||
d2d00862 RQ |
2624 | if (pdev->dev.of_node) { |
2625 | rc = gpmc_probe_dt(pdev); | |
2626 | if (rc) | |
2627 | return rc; | |
2628 | } else { | |
2629 | gpmc_cs_num = GPMC_CS_NUM; | |
2630 | gpmc_nr_waitpins = GPMC_NR_WAITPINS; | |
2631 | } | |
2632 | ||
89aed3cd BN |
2633 | gpmc->waitpins = devm_kzalloc(&pdev->dev, |
2634 | gpmc_nr_waitpins * sizeof(struct gpmc_waitpin), | |
2635 | GFP_KERNEL); | |
2636 | if (!gpmc->waitpins) | |
2637 | return -ENOMEM; | |
2638 | ||
2639 | for (i = 0; i < gpmc_nr_waitpins; i++) | |
2640 | gpmc->waitpins[i].pin = GPMC_WAITPIN_INVALID; | |
2641 | ||
b3f5525c | 2642 | pm_runtime_enable(&pdev->dev); |
2643 | pm_runtime_get_sync(&pdev->dev); | |
1daa8c1d | 2644 | |
4bbbc1ad | 2645 | l = gpmc_read_reg(GPMC_REVISION); |
aa8d4767 JH |
2646 | |
2647 | /* | |
2648 | * FIXME: Once device-tree migration is complete the below flags | |
2649 | * should be populated based upon the device-tree compatible | |
2650 | * string. For now just use the IP revision. OMAP3+ devices have | |
2651 | * the wr_access and wr_data_mux_bus register fields. OMAP4+ | |
2652 | * devices support the addr-addr-data multiplex protocol. | |
2653 | * | |
2654 | * GPMC IP revisions: | |
2655 | * - OMAP24xx = 2.0 | |
2656 | * - OMAP3xxx = 5.0 | |
2657 | * - OMAP44xx/54xx/AM335x = 6.0 | |
2658 | */ | |
da496873 AM |
2659 | if (GPMC_REVISION_MAJOR(l) > 0x4) |
2660 | gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS; | |
aa8d4767 JH |
2661 | if (GPMC_REVISION_MAJOR(l) > 0x5) |
2662 | gpmc_capability |= GPMC_HAS_MUX_AAD; | |
384258f2 | 2663 | dev_info(gpmc->dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l), |
da496873 AM |
2664 | GPMC_REVISION_MINOR(l)); |
2665 | ||
7e58accf | 2666 | gpmc_mem_init(gpmc); |
d2d00862 RQ |
2667 | rc = gpmc_gpio_init(gpmc); |
2668 | if (rc) | |
2669 | goto gpio_init_failed; | |
db97eb7d | 2670 | |
b2bac25a | 2671 | gpmc->nirqs = GPMC_NR_NAND_IRQS + gpmc_nr_waitpins; |
384258f2 RQ |
2672 | rc = gpmc_setup_irq(gpmc); |
2673 | if (rc) { | |
2674 | dev_err(gpmc->dev, "gpmc_setup_irq failed\n"); | |
525fe43f | 2675 | goto gpio_init_failed; |
384258f2 | 2676 | } |
da496873 | 2677 | |
23540d6e | 2678 | gpmc_probe_dt_children(pdev); |
bc6b1e7b | 2679 | |
77ed5e9d TL |
2680 | gpmc->nb.notifier_call = omap_gpmc_context_notifier; |
2681 | cpu_pm_register_notifier(&gpmc->nb); | |
2682 | ||
da496873 | 2683 | return 0; |
384258f2 | 2684 | |
d2d00862 RQ |
2685 | gpio_init_failed: |
2686 | gpmc_mem_exit(); | |
384258f2 | 2687 | pm_runtime_put_sync(&pdev->dev); |
d2d00862 RQ |
2688 | pm_runtime_disable(&pdev->dev); |
2689 | ||
384258f2 | 2690 | return rc; |
da496873 AM |
2691 | } |
2692 | ||
351a102d | 2693 | static int gpmc_remove(struct platform_device *pdev) |
da496873 | 2694 | { |
89aed3cd | 2695 | int i; |
384258f2 RQ |
2696 | struct gpmc_device *gpmc = platform_get_drvdata(pdev); |
2697 | ||
77ed5e9d | 2698 | cpu_pm_unregister_notifier(&gpmc->nb); |
89aed3cd BN |
2699 | for (i = 0; i < gpmc_nr_waitpins; i++) |
2700 | gpmc_free_waitpin(gpmc, i); | |
384258f2 | 2701 | gpmc_free_irq(gpmc); |
da496873 | 2702 | gpmc_mem_exit(); |
b3f5525c | 2703 | pm_runtime_put_sync(&pdev->dev); |
2704 | pm_runtime_disable(&pdev->dev); | |
384258f2 | 2705 | |
da496873 AM |
2706 | return 0; |
2707 | } | |
2708 | ||
b536dd41 | 2709 | #ifdef CONFIG_PM_SLEEP |
2710 | static int gpmc_suspend(struct device *dev) | |
2711 | { | |
77ed5e9d TL |
2712 | struct gpmc_device *gpmc = dev_get_drvdata(dev); |
2713 | ||
2714 | omap3_gpmc_save_context(gpmc); | |
b536dd41 | 2715 | pm_runtime_put_sync(dev); |
77ed5e9d TL |
2716 | gpmc->is_suspended = 1; |
2717 | ||
b536dd41 | 2718 | return 0; |
2719 | } | |
2720 | ||
2721 | static int gpmc_resume(struct device *dev) | |
2722 | { | |
77ed5e9d TL |
2723 | struct gpmc_device *gpmc = dev_get_drvdata(dev); |
2724 | ||
b536dd41 | 2725 | pm_runtime_get_sync(dev); |
77ed5e9d TL |
2726 | omap3_gpmc_restore_context(gpmc); |
2727 | gpmc->is_suspended = 0; | |
2728 | ||
b536dd41 | 2729 | return 0; |
2730 | } | |
2731 | #endif | |
2732 | ||
2733 | static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume); | |
2734 | ||
854fd920 RQ |
2735 | #ifdef CONFIG_OF |
2736 | static const struct of_device_id gpmc_dt_ids[] = { | |
2737 | { .compatible = "ti,omap2420-gpmc" }, | |
2738 | { .compatible = "ti,omap2430-gpmc" }, | |
2739 | { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */ | |
2740 | { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */ | |
2741 | { .compatible = "ti,am3352-gpmc" }, /* am335x devices */ | |
2742 | { .compatible = "ti,am64-gpmc" }, | |
2743 | { } | |
2744 | }; | |
2745 | MODULE_DEVICE_TABLE(of, gpmc_dt_ids); | |
2746 | #endif | |
2747 | ||
da496873 AM |
2748 | static struct platform_driver gpmc_driver = { |
2749 | .probe = gpmc_probe, | |
351a102d | 2750 | .remove = gpmc_remove, |
da496873 AM |
2751 | .driver = { |
2752 | .name = DEVICE_NAME, | |
bc6b1e7b | 2753 | .of_match_table = of_match_ptr(gpmc_dt_ids), |
b536dd41 | 2754 | .pm = &gpmc_pm_ops, |
da496873 AM |
2755 | }, |
2756 | }; | |
2757 | ||
854fd920 RQ |
2758 | module_platform_driver(gpmc_driver); |
2759 | ||
2760 | MODULE_DESCRIPTION("Texas Instruments GPMC driver"); | |
2761 | MODULE_LICENSE("GPL"); |