From 080c492df02bd1171963d70daf7305a72443873d Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Tue, 25 Mar 2014 19:51:41 +0100 Subject: ARM: davinci: da850: update SATA AHCI support Update SATA AHCI support to make use of the new ahci_da850 host driver (instead of the generic ahci_platform one) and remove deprecated ahci_platform_data code. Cc: Sekhar Nori Cc: Kevin Hilman Cc: Hans de Goede Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Tejun Heo --- arch/arm/mach-davinci/da850.c | 2 +- arch/arm/mach-davinci/devices-da8xx.c | 99 +++-------------------------------- 2 files changed, 9 insertions(+), 92 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c index 2ab00434b2eb..85399c98f84a 100644 --- a/arch/arm/mach-davinci/da850.c +++ b/arch/arm/mach-davinci/da850.c @@ -472,7 +472,7 @@ static struct clk_lookup da850_clks[] = { CLK("spi_davinci.0", NULL, &spi0_clk), CLK("spi_davinci.1", NULL, &spi1_clk), CLK("vpif", NULL, &vpif_clk), - CLK("ahci", NULL, &sata_clk), + CLK("ahci_da850", NULL, &sata_clk), CLK("davinci-rproc.0", NULL, &dsp_clk), CLK("ehrpwm", "fck", &ehrpwm_clk), CLK("ehrpwm", "tbclk", &ehrpwm_tbclk), diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c index 0486cdf28c8d..56ea41d5f849 100644 --- a/arch/arm/mach-davinci/devices-da8xx.c +++ b/arch/arm/mach-davinci/devices-da8xx.c @@ -1020,111 +1020,29 @@ int __init da8xx_register_spi_bus(int instance, unsigned num_chipselect) } #ifdef CONFIG_ARCH_DAVINCI_DA850 - static struct resource da850_sata_resources[] = { { .start = DA850_SATA_BASE, .end = DA850_SATA_BASE + 0x1fff, .flags = IORESOURCE_MEM, }, + { + .start = DA8XX_SYSCFG1_BASE + DA8XX_PWRDN_REG, + .end = DA8XX_SYSCFG1_BASE + DA8XX_PWRDN_REG + 0x3, + .flags = IORESOURCE_MEM, + }, { .start = IRQ_DA850_SATAINT, .flags = IORESOURCE_IRQ, }, }; -/* SATA PHY Control Register offset from AHCI base */ -#define SATA_P0PHYCR_REG 0x178 - -#define SATA_PHY_MPY(x) ((x) << 0) -#define SATA_PHY_LOS(x) ((x) << 6) -#define SATA_PHY_RXCDR(x) ((x) << 10) -#define SATA_PHY_RXEQ(x) ((x) << 13) -#define SATA_PHY_TXSWING(x) ((x) << 19) -#define SATA_PHY_ENPLL(x) ((x) << 31) - -static struct clk *da850_sata_clk; -static unsigned long da850_sata_refclkpn; - -/* Supported DA850 SATA crystal frequencies */ -#define KHZ_TO_HZ(freq) ((freq) * 1000) -static unsigned long da850_sata_xtal[] = { - KHZ_TO_HZ(300000), - KHZ_TO_HZ(250000), - 0, /* Reserved */ - KHZ_TO_HZ(187500), - KHZ_TO_HZ(150000), - KHZ_TO_HZ(125000), - KHZ_TO_HZ(120000), - KHZ_TO_HZ(100000), - KHZ_TO_HZ(75000), - KHZ_TO_HZ(60000), -}; - -static int da850_sata_init(struct device *dev, void __iomem *addr) -{ - int i, ret; - unsigned int val; - - da850_sata_clk = clk_get(dev, NULL); - if (IS_ERR(da850_sata_clk)) - return PTR_ERR(da850_sata_clk); - - ret = clk_prepare_enable(da850_sata_clk); - if (ret) - goto err0; - - /* Enable SATA clock receiver */ - val = __raw_readl(DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG)); - val &= ~BIT(0); - __raw_writel(val, DA8XX_SYSCFG1_VIRT(DA8XX_PWRDN_REG)); - - /* Get the multiplier needed for 1.5GHz PLL output */ - for (i = 0; i < ARRAY_SIZE(da850_sata_xtal); i++) - if (da850_sata_xtal[i] == da850_sata_refclkpn) - break; - - if (i == ARRAY_SIZE(da850_sata_xtal)) { - ret = -EINVAL; - goto err1; - } - - val = SATA_PHY_MPY(i + 1) | - SATA_PHY_LOS(1) | - SATA_PHY_RXCDR(4) | - SATA_PHY_RXEQ(1) | - SATA_PHY_TXSWING(3) | - SATA_PHY_ENPLL(1); - - __raw_writel(val, addr + SATA_P0PHYCR_REG); - - return 0; - -err1: - clk_disable_unprepare(da850_sata_clk); -err0: - clk_put(da850_sata_clk); - return ret; -} - -static void da850_sata_exit(struct device *dev) -{ - clk_disable_unprepare(da850_sata_clk); - clk_put(da850_sata_clk); -} - -static struct ahci_platform_data da850_sata_pdata = { - .init = da850_sata_init, - .exit = da850_sata_exit, -}; - static u64 da850_sata_dmamask = DMA_BIT_MASK(32); static struct platform_device da850_sata_device = { - .name = "ahci", + .name = "ahci_da850", .id = -1, .dev = { - .platform_data = &da850_sata_pdata, .dma_mask = &da850_sata_dmamask, .coherent_dma_mask = DMA_BIT_MASK(32), }, @@ -1134,9 +1052,8 @@ static struct platform_device da850_sata_device = { int __init da850_register_sata(unsigned long refclkpn) { - da850_sata_refclkpn = refclkpn; - if (!da850_sata_refclkpn) - return -EINVAL; + /* please see comment in drivers/ata/ahci_da850.c */ + BUG_ON(refclkpn != 100 * 1000 * 1000); return platform_device_register(&da850_sata_device); } -- cgit v1.2.3-58-ga151