arch/arm/mach-spear13xx/spear1340.c

   1 /*
   2  * arch/arm/mach-spear13xx/spear1340.c
   3  *
   4  * SPEAr1340 machine source file
   5  *
   6  * Copyright (C) 2012 ST Microelectronics
   7  * Viresh Kumar <viresh.linux@gmail.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13
  14 #define pr_fmt(fmt) "SPEAr1340: " fmt
  15
  16 #include <linux/ahci_platform.h>
  17 #include <linux/amba/serial.h>
  18 #include <linux/delay.h>
  19 #include <linux/dw_dmac.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/irqchip.h>
  22 #include <asm/mach/arch.h>
  23 #include <mach/dma.h>
  24 #include <mach/generic.h>
  25 #include <mach/spear.h>
  26
  27 /* Base addresses */
  28 #define SPEAR1340_SATA_BASE                     UL(0xB1000000)
  29 #define SPEAR1340_UART1_BASE                    UL(0xB4100000)
  30
  31 /* Power Management Registers */
  32 #define SPEAR1340_PCM_CFG                       (VA_MISC_BASE + 0x100)
  33 #define SPEAR1340_PCM_WKUP_CFG                  (VA_MISC_BASE + 0x104)
  34 #define SPEAR1340_SWITCH_CTR                    (VA_MISC_BASE + 0x108)
  35
  36 #define SPEAR1340_PERIP1_SW_RST                 (VA_MISC_BASE + 0x318)
  37 #define SPEAR1340_PERIP2_SW_RST                 (VA_MISC_BASE + 0x31C)
  38 #define SPEAR1340_PERIP3_SW_RST                 (VA_MISC_BASE + 0x320)
  39
  40 /* PCIE - SATA configuration registers */
  41 #define SPEAR1340_PCIE_SATA_CFG                 (VA_MISC_BASE + 0x424)
  42         /* PCIE CFG MASks */
  43         #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT       (1 << 11)
  44         #define SPEAR1340_PCIE_CFG_POWERUP_RESET        (1 << 10)
  45         #define SPEAR1340_PCIE_CFG_CORE_CLK_EN          (1 << 9)
  46         #define SPEAR1340_PCIE_CFG_AUX_CLK_EN           (1 << 8)
  47         #define SPEAR1340_SATA_CFG_TX_CLK_EN            (1 << 4)
  48         #define SPEAR1340_SATA_CFG_RX_CLK_EN            (1 << 3)
  49         #define SPEAR1340_SATA_CFG_POWERUP_RESET        (1 << 2)
  50         #define SPEAR1340_SATA_CFG_PM_CLK_EN            (1 << 1)
  51         #define SPEAR1340_PCIE_SATA_SEL_PCIE            (0)
  52         #define SPEAR1340_PCIE_SATA_SEL_SATA            (1)
  53         #define SPEAR1340_SATA_PCIE_CFG_MASK            0xF1F
  54         #define SPEAR1340_PCIE_CFG_VAL  (SPEAR1340_PCIE_SATA_SEL_PCIE | \
  55                         SPEAR1340_PCIE_CFG_AUX_CLK_EN | \
  56                         SPEAR1340_PCIE_CFG_CORE_CLK_EN | \
  57                         SPEAR1340_PCIE_CFG_POWERUP_RESET | \
  58                         SPEAR1340_PCIE_CFG_DEVICE_PRESENT)
  59         #define SPEAR1340_SATA_CFG_VAL  (SPEAR1340_PCIE_SATA_SEL_SATA | \
  60                         SPEAR1340_SATA_CFG_PM_CLK_EN | \
  61                         SPEAR1340_SATA_CFG_POWERUP_RESET | \
  62                         SPEAR1340_SATA_CFG_RX_CLK_EN | \
  63                         SPEAR1340_SATA_CFG_TX_CLK_EN)
  64
  65 #define SPEAR1340_PCIE_MIPHY_CFG                (VA_MISC_BASE + 0x428)
  66         #define SPEAR1340_MIPHY_OSC_BYPASS_EXT          (1 << 31)
  67         #define SPEAR1340_MIPHY_CLK_REF_DIV2            (1 << 27)
  68         #define SPEAR1340_MIPHY_CLK_REF_DIV4            (2 << 27)
  69         #define SPEAR1340_MIPHY_CLK_REF_DIV8            (3 << 27)
  70         #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x)        (x << 0)
  71         #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \
  72                         (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
  73                         SPEAR1340_MIPHY_CLK_REF_DIV2 | \
  74                         SPEAR1340_MIPHY_PLL_RATIO_TOP(60))
  75         #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \
  76                         (SPEAR1340_MIPHY_PLL_RATIO_TOP(120))
  77         #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \
  78                         (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
  79                         SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
  80
  81 static struct dw_dma_slave uart1_dma_param[] = {
  82         {
  83                 /* Tx */
  84                 .cfg_hi = DWC_CFGH_DST_PER(SPEAR1340_DMA_REQ_UART1_TX),
  85                 .cfg_lo = 0,
  86                 .src_master = DMA_MASTER_MEMORY,
  87                 .dst_master = SPEAR1340_DMA_MASTER_UART1,
  88         }, {
  89                 /* Rx */
  90                 .cfg_hi = DWC_CFGH_SRC_PER(SPEAR1340_DMA_REQ_UART1_RX),
  91                 .cfg_lo = 0,
  92                 .src_master = SPEAR1340_DMA_MASTER_UART1,
  93                 .dst_master = DMA_MASTER_MEMORY,
  94         }
  95 };
  96
  97 static struct amba_pl011_data uart1_data = {
  98         .dma_filter = dw_dma_filter,
  99         .dma_tx_param = &uart1_dma_param[0],
 100         .dma_rx_param = &uart1_dma_param[1],
 101 };
 102
 103 /* SATA device registration */
 104 static int sata_miphy_init(struct device *dev, void __iomem *addr)
 105 {
 106         writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG);
 107         writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK,
 108                         SPEAR1340_PCIE_MIPHY_CFG);
 109         /* Switch on sata power domain */
 110         writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG);
 111         msleep(20);
 112         /* Disable PCIE SATA Controller reset */
 113         writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)),
 114                         SPEAR1340_PERIP1_SW_RST);
 115         msleep(20);
 116
 117         return 0;
 118 }
 119
 120 void sata_miphy_exit(struct device *dev)
 121 {
 122         writel(0, SPEAR1340_PCIE_SATA_CFG);
 123         writel(0, SPEAR1340_PCIE_MIPHY_CFG);
 124
 125         /* Enable PCIE SATA Controller reset */
 126         writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)),
 127                         SPEAR1340_PERIP1_SW_RST);
 128         msleep(20);
 129         /* Switch off sata power domain */
 130         writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG);
 131         msleep(20);
 132 }
 133
 134 int sata_suspend(struct device *dev)
 135 {
 136         if (dev->power.power_state.event == PM_EVENT_FREEZE)
 137                 return 0;
 138
 139         sata_miphy_exit(dev);
 140
 141         return 0;
 142 }
 143
 144 int sata_resume(struct device *dev)
 145 {
 146         if (dev->power.power_state.event == PM_EVENT_THAW)
 147                 return 0;
 148
 149         return sata_miphy_init(dev, NULL);
 150 }
 151
 152 static struct ahci_platform_data sata_pdata = {
 153         .init = sata_miphy_init,
 154         .exit = sata_miphy_exit,
 155         .suspend = sata_suspend,
 156         .resume = sata_resume,
 157 };
 158
 159 /* Add SPEAr1340 auxdata to pass platform data */
 160 static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = {
 161         OF_DEV_AUXDATA("arasan,cf-spear1340", MCIF_CF_BASE, NULL, &cf_dma_priv),
 162         OF_DEV_AUXDATA("snps,dma-spear1340", DMAC0_BASE, NULL, &dmac_plat_data),
 163         OF_DEV_AUXDATA("snps,dma-spear1340", DMAC1_BASE, NULL, &dmac_plat_data),
 164         OF_DEV_AUXDATA("arm,pl022", SSP_BASE, NULL, &pl022_plat_data),
 165
 166         OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL,
 167                         &sata_pdata),
 168         OF_DEV_AUXDATA("arm,pl011", SPEAR1340_UART1_BASE, NULL, &uart1_data),
 169         {}
 170 };
 171
 172 static void __init spear1340_dt_init(void)
 173 {
 174         of_platform_populate(NULL, of_default_bus_match_table,
 175                         spear1340_auxdata_lookup, NULL);
 176 }
 177
 178 static const char * const spear1340_dt_board_compat[] = {
 179         "st,spear1340",
 180         "st,spear1340-evb",
 181         NULL,
 182 };
 183
 184 DT_MACHINE_START(SPEAR1340_DT, "ST SPEAr1340 SoC with Flattened Device Tree")
 185         .smp            =       smp_ops(spear13xx_smp_ops),
 186         .map_io         =       spear13xx_map_io,
 187         .init_irq       =       irqchip_init,
 188         .init_time      =       spear13xx_timer_init,
 189         .init_machine   =       spear1340_dt_init,
 190         .restart        =       spear_restart,
 191         .dt_compat      =       spear1340_dt_board_compat,
 192 MACHINE_END