arch/arm/mach-spear/spear3xx.c

   1 /*
   2  * arch/arm/mach-spear3xx/spear3xx.c
   3  *
   4  * SPEAr3XX machines common source file
   5  *
   6  * Copyright (C) 2009-2012 ST Microelectronics
   7  * Viresh Kumar <vireshk@kernel.org>
   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) "SPEAr3xx: " fmt
  15
  16 #include <linux/amba/pl022.h>
  17 #include <linux/amba/pl080.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <asm/mach/map.h>
  21 #include "pl080.h"
  22 #include "generic.h"
  23 #include <mach/spear.h>
  24 #include <mach/misc_regs.h>
  25
  26 /* ssp device registration */
  27 struct pl022_ssp_controller pl022_plat_data = {
  28         .bus_id = 0,
  29         .enable_dma = 1,
  30         .dma_filter = pl08x_filter_id,
  31         .dma_tx_param = "ssp0_tx",
  32         .dma_rx_param = "ssp0_rx",
  33 };
  34
  35 /* dmac device registration */
  36 struct pl08x_platform_data pl080_plat_data = {
  37         .memcpy_burst_size = PL08X_BURST_SZ_16,
  38         .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
  39         .memcpy_prot_buff = true,
  40         .memcpy_prot_cache = true,
  41         .lli_buses = PL08X_AHB1,
  42         .mem_buses = PL08X_AHB1,
  43         .get_xfer_signal = pl080_get_signal,
  44         .put_xfer_signal = pl080_put_signal,
  45 };
  46
  47 /*
  48  * Following will create 16MB static virtual/physical mappings
  49  * PHYSICAL             VIRTUAL
  50  * 0xD0000000           0xFD000000
  51  * 0xFC000000           0xFC000000
  52  */
  53 struct map_desc spear3xx_io_desc[] __initdata = {
  54         {
  55                 .virtual        = (unsigned long)VA_SPEAR_ICM1_2_BASE,
  56                 .pfn            = __phys_to_pfn(SPEAR_ICM1_2_BASE),
  57                 .length         = SZ_16M,
  58                 .type           = MT_DEVICE
  59         }, {
  60                 .virtual        = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
  61                 .pfn            = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
  62                 .length         = SZ_16M,
  63                 .type           = MT_DEVICE
  64         },
  65 };
  66
  67 /* This will create static memory mapping for selected devices */
  68 void __init spear3xx_map_io(void)
  69 {
  70         iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
  71 }
  72
  73 void __init spear3xx_timer_init(void)
  74 {
  75         char pclk_name[] = "pll3_clk";
  76         struct clk *gpt_clk, *pclk;
  77
  78         spear3xx_clk_init(MISC_BASE, VA_SPEAR320_SOC_CONFIG_BASE);
  79
  80         /* get the system timer clock */
  81         gpt_clk = clk_get_sys("gpt0", NULL);
  82         if (IS_ERR(gpt_clk)) {
  83                 pr_err("%s:couldn't get clk for gpt\n", __func__);
  84                 BUG();
  85         }
  86
  87         /* get the suitable parent clock for timer*/
  88         pclk = clk_get(NULL, pclk_name);
  89         if (IS_ERR(pclk)) {
  90                 pr_err("%s:couldn't get %s as parent for gpt\n",
  91                                 __func__, pclk_name);
  92                 BUG();
  93         }
  94
  95         clk_set_parent(gpt_clk, pclk);
  96         clk_put(gpt_clk);
  97         clk_put(pclk);
  98
  99         spear_setup_of_timer();
 100 }