Commit | Line | Data |
---|---|---|
b209e047 SR |
1 | /* OMAP SSI internal interface. |
2 | * | |
3 | * Copyright (C) 2010 Nokia Corporation. All rights reserved. | |
4 | * Copyright (C) 2013 Sebastian Reichel | |
5 | * | |
6 | * Contact: Carlos Chinea <carlos.chinea@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #ifndef __LINUX_HSI_OMAP_SSI_H__ | |
24 | #define __LINUX_HSI_OMAP_SSI_H__ | |
25 | ||
26 | #include <linux/device.h> | |
a1a0bec5 | 27 | #include <linux/module.h> |
b209e047 SR |
28 | #include <linux/platform_device.h> |
29 | #include <linux/hsi/hsi.h> | |
73e6ce09 | 30 | #include <linux/gpio/consumer.h> |
b209e047 SR |
31 | #include <linux/interrupt.h> |
32 | #include <linux/io.h> | |
33 | ||
34 | #define SSI_MAX_CHANNELS 8 | |
35 | #define SSI_MAX_GDD_LCH 8 | |
36 | #define SSI_BYTES_TO_FRAMES(x) ((((x) - 1) >> 2) + 1) | |
37 | ||
2083057a SR |
38 | #define SSI_WAKE_EN 0 |
39 | ||
b209e047 SR |
40 | /** |
41 | * struct omap_ssm_ctx - OMAP synchronous serial module (TX/RX) context | |
42 | * @mode: Bit transmission mode | |
43 | * @channels: Number of channels | |
44 | * @framesize: Frame size in bits | |
45 | * @timeout: RX frame timeout | |
46 | * @divisor: TX divider | |
47 | * @arb_mode: Arbitration mode for TX frame (Round robin, priority) | |
48 | */ | |
49 | struct omap_ssm_ctx { | |
50 | u32 mode; | |
51 | u32 channels; | |
52 | u32 frame_size; | |
53 | union { | |
54 | u32 timeout; /* Rx Only */ | |
55 | struct { | |
56 | u32 arb_mode; | |
57 | u32 divisor; | |
58 | }; /* Tx only */ | |
59 | }; | |
60 | }; | |
61 | ||
62 | /** | |
63 | * struct omap_ssi_port - OMAP SSI port data | |
64 | * @dev: device associated to the port (HSI port) | |
65 | * @pdev: platform device associated to the port | |
66 | * @sst_dma: SSI transmitter physical base address | |
67 | * @ssr_dma: SSI receiver physical base address | |
68 | * @sst_base: SSI transmitter base address | |
69 | * @ssr_base: SSI receiver base address | |
70 | * @wk_lock: spin lock to serialize access to the wake lines | |
71 | * @lock: Spin lock to serialize access to the SSI port | |
72 | * @channels: Current number of channels configured (1,2,4 or 8) | |
73 | * @txqueue: TX message queues | |
74 | * @rxqueue: RX message queues | |
75 | * @brkqueue: Queue of incoming HWBREAK requests (FRAME mode) | |
4e552310 SR |
76 | * @errqueue: Queue for failed messages |
77 | * @errqueue_work: Delayed Work for failed messages | |
b209e047 SR |
78 | * @irq: IRQ number |
79 | * @wake_irq: IRQ number for incoming wake line (-1 if none) | |
80 | * @wake_gpio: GPIO number for incoming wake line (-1 if none) | |
2083057a | 81 | * @flags: flags to keep track of states |
b209e047 | 82 | * @wk_refcount: Reference count for output wake line |
7c5d8162 | 83 | * @work: worker for starting TX |
b209e047 SR |
84 | * @sys_mpu_enable: Context for the interrupt enable register for irq 0 |
85 | * @sst: Context for the synchronous serial transmitter | |
86 | * @ssr: Context for the synchronous serial receiver | |
87 | */ | |
88 | struct omap_ssi_port { | |
89 | struct device *dev; | |
90 | struct device *pdev; | |
91 | dma_addr_t sst_dma; | |
92 | dma_addr_t ssr_dma; | |
93 | void __iomem *sst_base; | |
94 | void __iomem *ssr_base; | |
95 | spinlock_t wk_lock; | |
96 | spinlock_t lock; | |
97 | unsigned int channels; | |
98 | struct list_head txqueue[SSI_MAX_CHANNELS]; | |
99 | struct list_head rxqueue[SSI_MAX_CHANNELS]; | |
100 | struct list_head brkqueue; | |
4e552310 SR |
101 | struct list_head errqueue; |
102 | struct delayed_work errqueue_work; | |
b209e047 SR |
103 | unsigned int irq; |
104 | int wake_irq; | |
73e6ce09 | 105 | struct gpio_desc *wake_gpio; |
b209e047 | 106 | bool wktest:1; /* FIXME: HACK to be removed */ |
2083057a | 107 | unsigned long flags; |
b209e047 | 108 | unsigned int wk_refcount; |
7c5d8162 | 109 | struct work_struct work; |
b209e047 SR |
110 | /* OMAP SSI port context */ |
111 | u32 sys_mpu_enable; /* We use only one irq */ | |
112 | struct omap_ssm_ctx sst; | |
113 | struct omap_ssm_ctx ssr; | |
114 | u32 loss_count; | |
115 | u32 port_id; | |
116 | #ifdef CONFIG_DEBUG_FS | |
117 | struct dentry *dir; | |
118 | #endif | |
119 | }; | |
120 | ||
121 | /** | |
122 | * struct gdd_trn - GDD transaction data | |
123 | * @msg: Pointer to the HSI message being served | |
124 | * @sg: Pointer to the current sg entry being served | |
125 | */ | |
126 | struct gdd_trn { | |
127 | struct hsi_msg *msg; | |
128 | struct scatterlist *sg; | |
129 | }; | |
130 | ||
131 | /** | |
132 | * struct omap_ssi_controller - OMAP SSI controller data | |
133 | * @dev: device associated to the controller (HSI controller) | |
134 | * @sys: SSI I/O base address | |
135 | * @gdd: GDD I/O base address | |
136 | * @fck: SSI functional clock | |
137 | * @gdd_irq: IRQ line for GDD | |
138 | * @gdd_tasklet: bottom half for DMA transfers | |
139 | * @gdd_trn: Array of GDD transaction data for ongoing GDD transfers | |
140 | * @lock: lock to serialize access to GDD | |
4bcf7414 SR |
141 | * @fck_nb: DVFS notfifier block |
142 | * @fck_rate: clock rate | |
b209e047 SR |
143 | * @loss_count: To follow if we need to restore context or not |
144 | * @max_speed: Maximum TX speed (Kb/s) set by the clients. | |
b209e047 SR |
145 | * @gdd_gcr: SSI GDD saved context |
146 | * @get_loss: Pointer to omap_pm_get_dev_context_loss_count, if any | |
147 | * @port: Array of pointers of the ports of the controller | |
148 | * @dir: Debugfs SSI root directory | |
149 | */ | |
150 | struct omap_ssi_controller { | |
151 | struct device *dev; | |
152 | void __iomem *sys; | |
153 | void __iomem *gdd; | |
154 | struct clk *fck; | |
155 | unsigned int gdd_irq; | |
156 | struct tasklet_struct gdd_tasklet; | |
157 | struct gdd_trn gdd_trn[SSI_MAX_GDD_LCH]; | |
158 | spinlock_t lock; | |
4bcf7414 | 159 | struct notifier_block fck_nb; |
b209e047 SR |
160 | unsigned long fck_rate; |
161 | u32 loss_count; | |
162 | u32 max_speed; | |
163 | /* OMAP SSI Controller context */ | |
b209e047 SR |
164 | u32 gdd_gcr; |
165 | int (*get_loss)(struct device *dev); | |
166 | struct omap_ssi_port **port; | |
167 | #ifdef CONFIG_DEBUG_FS | |
168 | struct dentry *dir; | |
169 | #endif | |
170 | }; | |
171 | ||
4bcf7414 SR |
172 | void omap_ssi_port_update_fclk(struct hsi_controller *ssi, |
173 | struct omap_ssi_port *omap_port); | |
174 | ||
0fae1989 SR |
175 | extern struct platform_driver ssi_port_pdriver; |
176 | ||
b209e047 | 177 | #endif /* __LINUX_HSI_OMAP_SSI_H__ */ |