From: Tony Lindgren Date: Fri, 13 Mar 2009 18:04:01 +0000 (+0000) Subject: Set the smc91x timings for rx51 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=ca0467553d2eb424002d8986542704fc7647faf5;p=linux-2.6-omap-h63xx.git Set the smc91x timings for rx51 This could be converted into more generic smc91x init code. Signed-off-by: Tony Lindgren Acked-by: Lauri Leukkunen --- diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c index 49c3d80eff5..88f9f43c507 100644 --- a/arch/arm/mach-omap2/board-rx51-peripherals.c +++ b/arch/arm/mach-omap2/board-rx51-peripherals.c @@ -28,13 +28,14 @@ #include #include -#define RX51_ETHR_GPIO_IRQ 54 +#define SMC91X_CS 1 +#define SMC91X_GPIO_IRQ 54 +#define SMC91X_GPIO_RESET 164 +#define SMC91X_GPIO_PWRDWN 86 #define RX51_TSC2005_RESET_GPIO 104 #define RX51_TSC2005_IRQ_GPIO 100 -#define RX51_SMC91X_CS 1 - static struct resource rx51_smc91x_resources[] = { [0] = { .flags = IORESOURCE_MEM, @@ -71,7 +72,6 @@ static struct omap2_mcspi_device_config tsc2005_mcspi_config = { .single_channel = 1, }; - static struct spi_board_info rx51_peripherals_spi_board_info[] = { [0] = { .modalias = "tsc2005", @@ -143,37 +143,92 @@ static struct platform_device *rx51_peripherals_devices[] = { &rx51_smc91x_device, }; +/* + * Timings are taken from smsc-lan91c96-ms.pdf + */ +static int smc91x_init_gpmc(int cs) +{ + struct gpmc_timings t; + const int t2_r = 45; /* t2 in Figure 12.10 */ + const int t2_w = 30; /* t2 in Figure 12.11 */ + const int t3 = 15; /* t3 in Figure 12.10 */ + const int t5_r = 0; /* t5 in Figure 12.10 */ + const int t6_r = 45; /* t6 in Figure 12.10 */ + const int t6_w = 0; /* t6 in Figure 12.11 */ + const int t7_w = 15; /* t7 in Figure 12.11 */ + const int t15 = 12; /* t15 in Figure 12.2 */ + const int t20 = 185; /* t20 in Figure 12.2 */ + + memset(&t, 0, sizeof(t)); + + t.cs_on = t15; + t.cs_rd_off = t3 + t2_r + t5_r; /* Figure 12.10 */ + t.cs_wr_off = t3 + t2_w + t6_w; /* Figure 12.11 */ + t.adv_on = t3; /* Figure 12.10 */ + t.adv_rd_off = t3 + t2_r; /* Figure 12.10 */ + t.adv_wr_off = t3 + t2_w; /* Figure 12.11 */ + t.oe_off = t3 + t2_r + t5_r; /* Figure 12.10 */ + t.oe_on = t.oe_off - t6_r; /* Figure 12.10 */ + t.we_off = t3 + t2_w + t6_w; /* Figure 12.11 */ + t.we_on = t.we_off - t7_w; /* Figure 12.11 */ + t.rd_cycle = t20; /* Figure 12.2 */ + t.wr_cycle = t20; /* Figure 12.4 */ + t.access = t3 + t2_r + t5_r; /* Figure 12.10 */ + t.wr_access = t3 + t2_w + t6_w; /* Figure 12.11 */ + + gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, GPMC_CONFIG1_DEVICESIZE_16); + + return gpmc_cs_set_timings(cs, &t); +} + static void __init rx51_init_smc91x(void) { - int eth_cs; unsigned long cs_mem_base; - unsigned int rate; - struct clk *l3ck; + int ret; - eth_cs = RX51_SMC91X_CS; + omap_cfg_reg(U8_34XX_GPIO54_DOWN); + omap_cfg_reg(G25_34XX_GPIO86_OUT); + omap_cfg_reg(H19_34XX_GPIO164_OUT); - l3ck = clk_get(NULL, "core_l3_ck"); - if (IS_ERR(l3ck)) - rate = 100000000; - else - rate = clk_get_rate(l3ck); - - if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) { + if (gpmc_cs_request(SMC91X_CS, SZ_16M, &cs_mem_base) < 0) { printk(KERN_ERR "Failed to request GPMC mem for smc91x\n"); return; } - rx51_smc91x_resources[0].start = cs_mem_base + 0x0; - rx51_smc91x_resources[0].end = cs_mem_base + 0xf; - udelay(100); + rx51_smc91x_resources[0].start = cs_mem_base + 0x300; + rx51_smc91x_resources[0].end = cs_mem_base + 0x30f; - if (gpio_request(RX51_ETHR_GPIO_IRQ, "SMC91X irq") < 0) { - printk(KERN_ERR "Failed to request GPIO%d for smc91x IRQ\n", - RX51_ETHR_GPIO_IRQ); - return; - } - gpio_direction_input(RX51_ETHR_GPIO_IRQ); - rx51_smc91x_resources[1].start = gpio_to_irq(RX51_ETHR_GPIO_IRQ); + smc91x_init_gpmc(SMC91X_CS); + + if (gpio_request(SMC91X_GPIO_IRQ, "SMC91X irq") < 0) + goto free1; + + gpio_direction_input(SMC91X_GPIO_IRQ); + rx51_smc91x_resources[1].start = gpio_to_irq(SMC91X_GPIO_IRQ); + + ret = gpio_request(SMC91X_GPIO_PWRDWN, "SMC91X powerdown"); + if (ret) + goto free2; + gpio_direction_output(SMC91X_GPIO_PWRDWN, 0); + + ret = gpio_request(SMC91X_GPIO_RESET, "SMC91X reset"); + if (ret) + goto free3; + gpio_direction_output(SMC91X_GPIO_RESET, 0); + gpio_set_value(SMC91X_GPIO_RESET, 1); + msleep(100); + gpio_set_value(SMC91X_GPIO_RESET, 0); + + return; + +free3: + gpio_free(SMC91X_GPIO_PWRDWN); +free2: + gpio_free(SMC91X_GPIO_IRQ); +free1: + gpmc_cs_free(SMC91X_CS); + + printk(KERN_ERR "Could not initialize smc91x\n"); } static void __init rx51_init_tsc2005(void)