arch/arm/mach-cns3xxx/devices.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * CNS3xxx common devices
   4  *
   5  * Copyright 2008 Cavium Networks
   6  *                Scott Shu
   7  * Copyright 2010 MontaVista Software, LLC.
   8  *                Anton Vorontsov <avorontsov@mvista.com>
   9  */
  10
  11 #include <linux/io.h>
  12 #include <linux/init.h>
  13 #include <linux/compiler.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/platform_device.h>
  16 #include "cns3xxx.h"
  17 #include "pm.h"
  18 #include "core.h"
  19 #include "devices.h"
  20
  21 /*
  22  * AHCI
  23  */
  24 static struct resource cns3xxx_ahci_resource[] = {
  25         [0] = {
  26                 .start  = CNS3XXX_SATA2_BASE,
  27                 .end    = CNS3XXX_SATA2_BASE + CNS3XXX_SATA2_SIZE - 1,
  28                 .flags  = IORESOURCE_MEM,
  29         },
  30         [1] = {
  31                 .start  = IRQ_CNS3XXX_SATA,
  32                 .end    = IRQ_CNS3XXX_SATA,
  33                 .flags  = IORESOURCE_IRQ,
  34         },
  35 };
  36
  37 static u64 cns3xxx_ahci_dmamask = DMA_BIT_MASK(32);
  38
  39 static struct platform_device cns3xxx_ahci_pdev = {
  40         .name           = "ahci",
  41         .id             = 0,
  42         .resource       = cns3xxx_ahci_resource,
  43         .num_resources  = ARRAY_SIZE(cns3xxx_ahci_resource),
  44         .dev            = {
  45                 .dma_mask               = &cns3xxx_ahci_dmamask,
  46                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  47         },
  48 };
  49
  50 void __init cns3xxx_ahci_init(void)
  51 {
  52         u32 tmp;
  53
  54         tmp = __raw_readl(MISC_SATA_POWER_MODE);
  55         tmp |= 0x1 << 16; /* Disable SATA PHY 0 from SLUMBER Mode */
  56         tmp |= 0x1 << 17; /* Disable SATA PHY 1 from SLUMBER Mode */
  57         __raw_writel(tmp, MISC_SATA_POWER_MODE);
  58
  59         /* Enable SATA PHY */
  60         cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY0);
  61         cns3xxx_pwr_power_up(0x1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_SATA_PHY1);
  62
  63         /* Enable SATA Clock */
  64         cns3xxx_pwr_clk_en(0x1 << PM_CLK_GATE_REG_OFFSET_SATA);
  65
  66         /* De-Asscer SATA Reset */
  67         cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SATA));
  68
  69         platform_device_register(&cns3xxx_ahci_pdev);
  70 }
  71
  72 /*
  73  * SDHCI
  74  */
  75 static struct resource cns3xxx_sdhci_resources[] = {
  76         [0] = {
  77                 .start = CNS3XXX_SDIO_BASE,
  78                 .end   = CNS3XXX_SDIO_BASE + SZ_4K - 1,
  79                 .flags = IORESOURCE_MEM,
  80         },
  81         [1] = {
  82                 .start = IRQ_CNS3XXX_SDIO,
  83                 .end   = IRQ_CNS3XXX_SDIO,
  84                 .flags = IORESOURCE_IRQ,
  85         },
  86 };
  87
  88 static struct platform_device cns3xxx_sdhci_pdev = {
  89         .name           = "sdhci-cns3xxx",
  90         .id             = 0,
  91         .num_resources  = ARRAY_SIZE(cns3xxx_sdhci_resources),
  92         .resource       = cns3xxx_sdhci_resources,
  93 };
  94
  95 void __init cns3xxx_sdhci_init(void)
  96 {
  97         u32 __iomem *gpioa = IOMEM(CNS3XXX_MISC_BASE_VIRT + 0x0014);
  98         u32 gpioa_pins = __raw_readl(gpioa);
  99
 100         /* MMC/SD pins share with GPIOA */
 101         gpioa_pins |= 0x1fff0004;
 102         __raw_writel(gpioa_pins, gpioa);
 103
 104         cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SDIO));
 105         cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SDIO));
 106
 107         platform_device_register(&cns3xxx_sdhci_pdev);
 108 }