2 * linux/arch/arm/mach-omap1/id.c
4 * OMAP1 CPU identification code
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
15 #include <linux/serial.h>
16 #include <linux/tty.h>
17 #include <linux/serial_8250.h>
18 #include <linux/serial_reg.h>
19 #include <linux/clk.h>
22 #include <asm/mach-types.h>
24 #include <asm/arch/board.h>
25 #include <asm/arch/mux.h>
26 #include <asm/arch/gpio.h>
27 #include <asm/arch/fpga.h>
29 #include <asm/arch/pm.h>
32 static struct clk * uart1_ck;
33 static struct clk * uart2_ck;
34 static struct clk * uart3_ck;
36 static inline unsigned int omap_serial_in(struct plat_serial8250_port *up,
39 offset <<= up->regshift;
40 return (unsigned int)__raw_readb(up->membase + offset);
43 static inline void omap_serial_outp(struct plat_serial8250_port *p, int offset,
46 offset <<= p->regshift;
47 __raw_writeb(value, p->membase + offset);
51 * Internal UARTs need to be initialized for the 8250 autoconfig to work
52 * properly. Note that the TX watermark initialization may not be needed
53 * once the 8250.c watermark handling code is merged.
55 static void __init omap_serial_reset(struct plat_serial8250_port *p)
57 omap_serial_outp(p, UART_OMAP_MDR1, 0x07); /* disable UART */
58 omap_serial_outp(p, UART_OMAP_SCR, 0x08); /* TX watermark */
59 omap_serial_outp(p, UART_OMAP_MDR1, 0x00); /* enable UART */
61 if (!cpu_is_omap1510()) {
62 omap_serial_outp(p, UART_OMAP_SYSC, 0x01);
63 while (!(omap_serial_in(p, UART_OMAP_SYSC) & 0x01));
67 static struct plat_serial8250_port serial_platform_data[] = {
69 .membase = (char*)IO_ADDRESS(OMAP_UART1_BASE),
70 .mapbase = (unsigned long)OMAP_UART1_BASE,
72 .flags = UPF_BOOT_AUTOCONF,
75 .uartclk = OMAP16XX_BASE_BAUD * 16,
78 .membase = (char*)IO_ADDRESS(OMAP_UART2_BASE),
79 .mapbase = (unsigned long)OMAP_UART2_BASE,
81 .flags = UPF_BOOT_AUTOCONF,
84 .uartclk = OMAP16XX_BASE_BAUD * 16,
87 .membase = (char*)IO_ADDRESS(OMAP_UART3_BASE),
88 .mapbase = (unsigned long)OMAP_UART3_BASE,
90 .flags = UPF_BOOT_AUTOCONF,
93 .uartclk = OMAP16XX_BASE_BAUD * 16,
98 static struct platform_device serial_device = {
100 .id = PLAT8250_DEV_PLATFORM,
102 .platform_data = serial_platform_data,
107 * Note that on Innovator-1510 UART2 pins conflict with USB2.
108 * By default UART2 does not work on Innovator-1510 if you have
109 * USB OHCI enabled. To use UART2, you must disable USB2 first.
111 void __init omap_serial_init(void)
114 const struct omap_uart_config *info;
116 if (cpu_is_omap730()) {
117 serial_platform_data[0].regshift = 0;
118 serial_platform_data[1].regshift = 0;
119 serial_platform_data[0].irq = INT_730_UART_MODEM_1;
120 serial_platform_data[1].irq = INT_730_UART_MODEM_IRDA_2;
123 if (cpu_is_omap1510()) {
124 serial_platform_data[0].uartclk = OMAP1510_BASE_BAUD * 16;
125 serial_platform_data[1].uartclk = OMAP1510_BASE_BAUD * 16;
126 serial_platform_data[2].uartclk = OMAP1510_BASE_BAUD * 16;
129 info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
133 for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
136 if (!((1 << i) & info->enabled_uarts)) {
137 serial_platform_data[i].membase = NULL;
138 serial_platform_data[i].mapbase = 0;
144 uart1_ck = clk_get(NULL, "uart1_ck");
145 if (IS_ERR(uart1_ck))
146 printk("Could not get uart1_ck\n");
148 clk_enable(uart1_ck);
149 if (cpu_is_omap1510())
150 clk_set_rate(uart1_ck, 12000000);
152 if (cpu_is_omap1510()) {
153 omap_cfg_reg(UART1_TX);
154 omap_cfg_reg(UART1_RTS);
155 if (machine_is_omap_innovator()) {
156 reg = fpga_read(OMAP1510_FPGA_POWER);
157 reg |= OMAP1510_FPGA_PCR_COM1_EN;
158 fpga_write(reg, OMAP1510_FPGA_POWER);
164 uart2_ck = clk_get(NULL, "uart2_ck");
165 if (IS_ERR(uart2_ck))
166 printk("Could not get uart2_ck\n");
168 clk_enable(uart2_ck);
169 if (cpu_is_omap1510())
170 clk_set_rate(uart2_ck, 12000000);
172 clk_set_rate(uart2_ck, 48000000);
174 if (cpu_is_omap1510()) {
175 omap_cfg_reg(UART2_TX);
176 omap_cfg_reg(UART2_RTS);
177 if (machine_is_omap_innovator()) {
178 reg = fpga_read(OMAP1510_FPGA_POWER);
179 reg |= OMAP1510_FPGA_PCR_COM2_EN;
180 fpga_write(reg, OMAP1510_FPGA_POWER);
186 uart3_ck = clk_get(NULL, "uart3_ck");
187 if (IS_ERR(uart3_ck))
188 printk("Could not get uart3_ck\n");
190 clk_enable(uart3_ck);
191 if (cpu_is_omap1510())
192 clk_set_rate(uart3_ck, 12000000);
194 if (cpu_is_omap1510()) {
195 omap_cfg_reg(UART3_TX);
196 omap_cfg_reg(UART3_RX);
200 omap_serial_reset(&serial_platform_data[i]);
204 #ifdef CONFIG_OMAP_SERIAL_WAKE
206 static irqreturn_t omap_serial_wake_interrupt(int irq, void *dev_id,
207 struct pt_regs *regs)
209 /* Need to do something with serial port right after wake-up? */
214 * Reroutes serial RX lines to GPIO lines for the duration of
215 * sleep to allow waking up the device from serial port even
218 void omap_serial_wake_trigger(int enable)
220 if (!cpu_is_omap16xx())
223 if (uart1_ck != NULL) {
225 omap_cfg_reg(V14_16XX_GPIO37);
227 omap_cfg_reg(V14_16XX_UART1_RX);
229 if (uart2_ck != NULL) {
231 omap_cfg_reg(R9_16XX_GPIO18);
233 omap_cfg_reg(R9_16XX_UART2_RX);
235 if (uart3_ck != NULL) {
237 omap_cfg_reg(L14_16XX_GPIO49);
239 omap_cfg_reg(L14_16XX_UART3_RX);
243 static void __init omap_serial_set_port_wakeup(int gpio_nr)
247 ret = omap_request_gpio(gpio_nr);
249 printk(KERN_ERR "Could not request UART wake GPIO: %i\n",
253 omap_set_gpio_direction(gpio_nr, 1);
254 ret = request_irq(OMAP_GPIO_IRQ(gpio_nr), &omap_serial_wake_interrupt,
255 SA_TRIGGER_RISING, "serial wakeup", NULL);
257 omap_free_gpio(gpio_nr);
258 printk(KERN_ERR "No interrupt for UART wake GPIO: %i\n",
262 enable_irq_wake(OMAP_GPIO_IRQ(gpio_nr));
265 static int __init omap_serial_wakeup_init(void)
267 if (!cpu_is_omap16xx())
270 if (uart1_ck != NULL)
271 omap_serial_set_port_wakeup(37);
272 if (uart2_ck != NULL)
273 omap_serial_set_port_wakeup(18);
274 if (uart3_ck != NULL)
275 omap_serial_set_port_wakeup(49);
279 late_initcall(omap_serial_wakeup_init);
281 #endif /* CONFIG_OMAP_SERIAL_WAKE */
283 static int __init omap_init(void)
285 return platform_device_register(&serial_device);
287 arch_initcall(omap_init);