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
);