forked from luck/tmp_suning_uos_patched
201 lines
5.0 KiB
C
201 lines
5.0 KiB
C
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/*
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* linux/arch/arm/mach-omap1/id.c
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*
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* OMAP1 CPU identification code
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/serial.h>
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#include <linux/tty.h>
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#include <linux/serial_8250.h>
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#include <linux/serial_reg.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/hardware/clock.h>
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#include <asm/arch/board.h>
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#include <asm/arch/mux.h>
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#include <asm/arch/fpga.h>
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static struct clk * uart1_ck = NULL;
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static struct clk * uart2_ck = NULL;
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static struct clk * uart3_ck = NULL;
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static inline unsigned int omap_serial_in(struct plat_serial8250_port *up,
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int offset)
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{
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offset <<= up->regshift;
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return (unsigned int)__raw_readb(up->membase + offset);
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}
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static inline void omap_serial_outp(struct plat_serial8250_port *p, int offset,
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int value)
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{
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offset <<= p->regshift;
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__raw_writeb(value, p->membase + offset);
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}
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/*
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* Internal UARTs need to be initialized for the 8250 autoconfig to work
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* properly. Note that the TX watermark initialization may not be needed
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* once the 8250.c watermark handling code is merged.
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*/
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static void __init omap_serial_reset(struct plat_serial8250_port *p)
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{
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omap_serial_outp(p, UART_OMAP_MDR1, 0x07); /* disable UART */
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omap_serial_outp(p, UART_OMAP_SCR, 0x08); /* TX watermark */
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omap_serial_outp(p, UART_OMAP_MDR1, 0x00); /* enable UART */
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if (!cpu_is_omap1510()) {
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omap_serial_outp(p, UART_OMAP_SYSC, 0x01);
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while (!(omap_serial_in(p, UART_OMAP_SYSC) & 0x01));
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}
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}
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static struct plat_serial8250_port serial_platform_data[] = {
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{
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.membase = (char*)IO_ADDRESS(OMAP_UART1_BASE),
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.mapbase = (unsigned long)OMAP_UART1_BASE,
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.irq = INT_UART1,
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.flags = UPF_BOOT_AUTOCONF,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = OMAP16XX_BASE_BAUD * 16,
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},
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{
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.membase = (char*)IO_ADDRESS(OMAP_UART2_BASE),
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.mapbase = (unsigned long)OMAP_UART2_BASE,
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.irq = INT_UART2,
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.flags = UPF_BOOT_AUTOCONF,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = OMAP16XX_BASE_BAUD * 16,
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},
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{
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.membase = (char*)IO_ADDRESS(OMAP_UART3_BASE),
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.mapbase = (unsigned long)OMAP_UART3_BASE,
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.irq = INT_UART3,
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.flags = UPF_BOOT_AUTOCONF,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = OMAP16XX_BASE_BAUD * 16,
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},
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{ },
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};
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static struct platform_device serial_device = {
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.name = "serial8250",
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.id = 0,
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.dev = {
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.platform_data = serial_platform_data,
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},
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};
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/*
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* Note that on Innovator-1510 UART2 pins conflict with USB2.
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* By default UART2 does not work on Innovator-1510 if you have
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* USB OHCI enabled. To use UART2, you must disable USB2 first.
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*/
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void __init omap_serial_init(int ports[OMAP_MAX_NR_PORTS])
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{
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int i;
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if (cpu_is_omap730()) {
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serial_platform_data[0].regshift = 0;
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serial_platform_data[1].regshift = 0;
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serial_platform_data[0].irq = INT_730_UART_MODEM_1;
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serial_platform_data[1].irq = INT_730_UART_MODEM_IRDA_2;
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}
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if (cpu_is_omap1510()) {
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serial_platform_data[0].uartclk = OMAP1510_BASE_BAUD * 16;
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serial_platform_data[1].uartclk = OMAP1510_BASE_BAUD * 16;
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serial_platform_data[2].uartclk = OMAP1510_BASE_BAUD * 16;
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}
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for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
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unsigned char reg;
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if (ports[i] == 0) {
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serial_platform_data[i].membase = NULL;
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serial_platform_data[i].mapbase = 0;
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continue;
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}
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switch (i) {
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case 0:
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uart1_ck = clk_get(NULL, "uart1_ck");
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if (IS_ERR(uart1_ck))
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printk("Could not get uart1_ck\n");
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else {
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clk_use(uart1_ck);
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if (cpu_is_omap1510())
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clk_set_rate(uart1_ck, 12000000);
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}
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if (cpu_is_omap1510()) {
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omap_cfg_reg(UART1_TX);
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omap_cfg_reg(UART1_RTS);
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if (machine_is_omap_innovator()) {
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reg = fpga_read(OMAP1510_FPGA_POWER);
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reg |= OMAP1510_FPGA_PCR_COM1_EN;
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fpga_write(reg, OMAP1510_FPGA_POWER);
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udelay(10);
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}
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}
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break;
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case 1:
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uart2_ck = clk_get(NULL, "uart2_ck");
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if (IS_ERR(uart2_ck))
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printk("Could not get uart2_ck\n");
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else {
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clk_use(uart2_ck);
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if (cpu_is_omap1510())
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clk_set_rate(uart2_ck, 12000000);
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else
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clk_set_rate(uart2_ck, 48000000);
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}
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if (cpu_is_omap1510()) {
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omap_cfg_reg(UART2_TX);
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omap_cfg_reg(UART2_RTS);
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if (machine_is_omap_innovator()) {
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reg = fpga_read(OMAP1510_FPGA_POWER);
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reg |= OMAP1510_FPGA_PCR_COM2_EN;
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fpga_write(reg, OMAP1510_FPGA_POWER);
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udelay(10);
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}
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}
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break;
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case 2:
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uart3_ck = clk_get(NULL, "uart3_ck");
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if (IS_ERR(uart3_ck))
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printk("Could not get uart3_ck\n");
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else {
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clk_use(uart3_ck);
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if (cpu_is_omap1510())
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clk_set_rate(uart3_ck, 12000000);
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}
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if (cpu_is_omap1510()) {
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omap_cfg_reg(UART3_TX);
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omap_cfg_reg(UART3_RX);
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}
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break;
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}
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omap_serial_reset(&serial_platform_data[i]);
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}
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}
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static int __init omap_init(void)
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{
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return platform_device_register(&serial_device);
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}
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arch_initcall(omap_init);
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