arch/arm/mach-cns3xxx/devices.c

   1 /*
   2  * CNS3xxx common devices
   3  *
   4  * Copyright 2008 Cavium Networks
   5  *                Scott Shu
   6  * Copyright 2010 MontaVista Software, LLC.
   7  *                Anton Vorontsov <avorontsov@mvista.com>
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/io.h>
  15 #include <linux/init.h>
  16 #include <linux/compiler.h>
  17 #include <linux/dma-mapping.h>
  18 #include <linux/platform_device.h>
  19 #include "cns3xxx.h"
  20 #include "pm.h"
  21 #include "core.h"
  22 #include "devices.h"
  23
  24 /*
  25  * AHCI
  26  */
  27 static struct resource cns3xxx_ahci_resource[] = {
  28         [0] = {
  29                 .start  = CNS3XXX_SATA2_BASE,
  30                 .end    = CNS3XXX_SATA2_BASE + CNS3XXX_SATA2_SIZE - 1,
  31                 .flags  = IORESOURCE_MEM,
  32         },
  33         [1] = {
  34                 .start  = IRQ_CNS3XXX_SATA,
  35                 .end    = IRQ_CNS3XXX_SATA,
  36                 .flags  = IORESOURCE_IRQ,
  37         },
  38 };
  39
  40 static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
  41
  42 static struct platform_device cns3xxx_ahci_pdev = {
  43         .name           = "ahci",
  44         .id             = 0,
  45         .resource       = cns3xxx_ahci_resource,
  46         .num_resources  = ARRAY_SIZE(cns3xxx_ahci_resource),
  47         .dev            = {
  48                 .dma_mask               = &cns3xxx_ahci_dmamask,
  49                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  50         },
  51 };
  52
  53 void __init cns3xxx_ahci_init(void)
  54 {
  55         u32 tmp;
  56
  57         tmp = __raw_readl(MISC_SATA_POWER_MODE);
  58         tmp |= 0x1 << 16; /* Disable SATA PHY 0 from SLUMBER Mode */
  59         tmp |= 0x1 << 17; /* Disable SATA PHY 1 from SLUMBER Mode */
  60         __raw_writel(tmp, MISC_SATA_POWER_MODE);
  61
  62         /* Enable SATA PHY */
  63         cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY0);
  64         cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY1);
  65
  66         /* Enable SATA Clock */
  67         cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_SATA);
  68
  69         /* De-Asscer SATA Reset */
  70         cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SATA));
  71
  72         platform_device_register(&cns3xxx_ahci_pdev);
  73 }
  74
  75 /*
  76  * SDHCI
  77  */
  78 static struct resource cns3xxx_sdhci_resources[] = {
  79         [0] = {
  80                 .start = CNS3XXX_SDIO_BASE,
  81                 .end   = CNS3XXX_SDIO_BASE + SZ_4K - 1,
  82                 .flags = IORESOURCE_MEM,
  83         },
  84         [1] = {
  85                 .start = IRQ_CNS3XXX_SDIO,
  86                 .end   = IRQ_CNS3XXX_SDIO,
  87                 .flags = IORESOURCE_IRQ,
  88         },
  89 };
  90
  91 static struct platform_device cns3xxx_sdhci_pdev = {
  92         .name           = "sdhci-cns3xxx",
  93         .id             = 0,
  94         .num_resources  = ARRAY_SIZE(cns3xxx_sdhci_resources),
  95         .resource       = cns3xxx_sdhci_resources,
  96 };
  97
  98 void __init cns3xxx_sdhci_init(void)
  99 {
 100         u32 __iomem *gpioa = IOMEM(CNS3XXX_MISC_BASE_VIRT + 0x0014);
 101         u32 gpioa_pins = __raw_readl(gpioa);
 102
 103         /* MMC/SD pins share with GPIOA */
 104         gpioa_pins |= 0x1fff0004;
 105         __raw_writel(gpioa_pins, gpioa);
 106
 107         cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SDIO));
 108         cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SDIO));
 109
 110         platform_device_register(&cns3xxx_sdhci_pdev);
 111 }