diff options
| author | Anton Vorontsov <avorontsov@mvista.com> | 2010-03-25 23:10:58 +0300 |
|---|---|---|
| committer | Anton Vorontsov <avorontsov@mvista.com> | 2010-06-08 17:37:09 +0400 |
| commit | 23f5cace4f858ddf40eb0ee77b984d329fd23518 (patch) | |
| tree | 939bffc2232efead633ea94548f0491e00e173b2 /arch/arm/mach-cns3xxx/devices.c | |
| parent | 6279d0ea928911f7c747a65e880c36a91b066805 (diff) | |
ARM: cns3xxx: Add support for AHCI controllers
CNS3xxx chips have AHCI-compatible SATA controller. This patch adds
the support using generic ahci_platform driver.
Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Diffstat (limited to 'arch/arm/mach-cns3xxx/devices.c')
| -rw-r--r-- | arch/arm/mach-cns3xxx/devices.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mach-cns3xxx/devices.c b/arch/arm/mach-cns3xxx/devices.c index b01a30114622..50b4d31c27c0 100644 --- a/arch/arm/mach-cns3xxx/devices.c +++ b/arch/arm/mach-cns3xxx/devices.c @@ -14,6 +14,7 @@ #include <linux/io.h> #include <linux/init.h> #include <linux/compiler.h> +#include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <mach/cns3xxx.h> #include <mach/irqs.h> @@ -21,6 +22,57 @@ #include "devices.h" /* + * AHCI + */ +static struct resource cns3xxx_ahci_resource[] = { + [0] = { + .start = CNS3XXX_SATA2_BASE, + .end = CNS3XXX_SATA2_BASE + CNS3XXX_SATA2_SIZE - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_CNS3XXX_SATA, + .end = IRQ_CNS3XXX_SATA, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32); + +static struct platform_device cns3xxx_ahci_pdev = { + .name = "ahci", + .id = 0, + .resource = cns3xxx_ahci_resource, + .num_resources = ARRAY_SIZE(cns3xxx_ahci_resource), + .dev = { + .dma_mask = &cns3xxx_ahci_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +void __init cns3xxx_ahci_init(void) +{ + u32 tmp; + + tmp = __raw_readl(MISC_SATA_POWER_MODE); + tmp |= 0x1 << 16; /* Disable SATA PHY 0 from SLUMBER Mode */ + tmp |= 0x1 << 17; /* Disable SATA PHY 1 from SLUMBER Mode */ + __raw_writel(tmp, MISC_SATA_POWER_MODE); + + /* Enable SATA PHY */ + cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY0); + cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY1); + + /* Enable SATA Clock */ + cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_SATA); + + /* De-Asscer SATA Reset */ + cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SATA)); + + platform_device_register(&cns3xxx_ahci_pdev); +} + +/* * SDHCI */ static struct resource cns3xxx_sdhci_resources[] = { |