Viresh Kumar | e3978dc | 2012-04-19 22:23:13 +0530 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-spear13xx/spear13xx.c |
| 3 | * |
| 4 | * SPEAr13XX machines common source file |
| 5 | * |
| 6 | * Copyright (C) 2012 ST Microelectronics |
| 7 | * Viresh Kumar <viresh.kumar@st.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) "SPEAr13xx: " fmt |
| 15 | |
| 16 | #include <linux/amba/pl022.h> |
| 17 | #include <linux/clk.h> |
| 18 | #include <linux/dw_dmac.h> |
| 19 | #include <linux/err.h> |
| 20 | #include <linux/of_irq.h> |
| 21 | #include <asm/hardware/cache-l2x0.h> |
| 22 | #include <asm/hardware/gic.h> |
| 23 | #include <asm/mach/map.h> |
| 24 | #include <asm/smp_twd.h> |
| 25 | #include <mach/dma.h> |
| 26 | #include <mach/generic.h> |
| 27 | #include <mach/spear.h> |
| 28 | |
| 29 | /* common dw_dma filter routine to be used by peripherals */ |
| 30 | bool dw_dma_filter(struct dma_chan *chan, void *slave) |
| 31 | { |
| 32 | struct dw_dma_slave *dws = (struct dw_dma_slave *)slave; |
| 33 | |
| 34 | if (chan->device->dev == dws->dma_dev) { |
| 35 | chan->private = slave; |
| 36 | return true; |
| 37 | } else { |
| 38 | return false; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | /* ssp device registration */ |
| 43 | static struct dw_dma_slave ssp_dma_param[] = { |
| 44 | { |
| 45 | /* Tx */ |
| 46 | .cfg_hi = DWC_CFGH_DST_PER(DMA_REQ_SSP0_TX), |
| 47 | .cfg_lo = 0, |
| 48 | .src_master = DMA_MASTER_MEMORY, |
| 49 | .dst_master = DMA_MASTER_SSP0, |
| 50 | }, { |
| 51 | /* Rx */ |
| 52 | .cfg_hi = DWC_CFGH_SRC_PER(DMA_REQ_SSP0_RX), |
| 53 | .cfg_lo = 0, |
| 54 | .src_master = DMA_MASTER_SSP0, |
| 55 | .dst_master = DMA_MASTER_MEMORY, |
| 56 | } |
| 57 | }; |
| 58 | |
| 59 | struct pl022_ssp_controller pl022_plat_data = { |
| 60 | .bus_id = 0, |
| 61 | .enable_dma = 1, |
| 62 | .dma_filter = dw_dma_filter, |
| 63 | .dma_rx_param = &ssp_dma_param[1], |
| 64 | .dma_tx_param = &ssp_dma_param[0], |
| 65 | .num_chipselect = 3, |
| 66 | }; |
| 67 | |
| 68 | /* CF device registration */ |
| 69 | struct dw_dma_slave cf_dma_priv = { |
| 70 | .cfg_hi = 0, |
| 71 | .cfg_lo = 0, |
| 72 | .src_master = 0, |
| 73 | .dst_master = 0, |
| 74 | }; |
| 75 | |
| 76 | /* dmac device registeration */ |
| 77 | struct dw_dma_platform_data dmac_plat_data = { |
| 78 | .nr_channels = 8, |
| 79 | .chan_allocation_order = CHAN_ALLOCATION_DESCENDING, |
| 80 | .chan_priority = CHAN_PRIORITY_DESCENDING, |
| 81 | }; |
| 82 | |
| 83 | void __init spear13xx_l2x0_init(void) |
| 84 | { |
| 85 | /* |
| 86 | * 512KB (64KB/way), 8-way associativity, parity supported |
| 87 | * |
| 88 | * FIXME: 9th bit, of Auxillary Controller register must be set |
| 89 | * for some spear13xx devices for stable L2 operation. |
| 90 | * |
| 91 | * Enable Early BRESP, L2 prefetch for Instruction and Data, |
| 92 | * write alloc and 'Full line of zero' options |
| 93 | * |
| 94 | */ |
| 95 | |
| 96 | writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL); |
| 97 | |
| 98 | /* |
| 99 | * Program following latencies in order to make |
| 100 | * SPEAr1340 work at 600 MHz |
| 101 | */ |
| 102 | writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL); |
| 103 | writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL); |
| 104 | l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Following will create 16MB static virtual/physical mappings |
| 109 | * PHYSICAL VIRTUAL |
| 110 | * 0xB3000000 0xFE000000 |
| 111 | * 0xE0000000 0xFD000000 |
| 112 | * 0xEC000000 0xFC000000 |
| 113 | * 0xED000000 0xFB000000 |
| 114 | */ |
| 115 | struct map_desc spear13xx_io_desc[] __initdata = { |
| 116 | { |
| 117 | .virtual = VA_PERIP_GRP2_BASE, |
| 118 | .pfn = __phys_to_pfn(PERIP_GRP2_BASE), |
| 119 | .length = SZ_16M, |
| 120 | .type = MT_DEVICE |
| 121 | }, { |
| 122 | .virtual = VA_PERIP_GRP1_BASE, |
| 123 | .pfn = __phys_to_pfn(PERIP_GRP1_BASE), |
| 124 | .length = SZ_16M, |
| 125 | .type = MT_DEVICE |
| 126 | }, { |
| 127 | .virtual = VA_A9SM_AND_MPMC_BASE, |
| 128 | .pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE), |
| 129 | .length = SZ_16M, |
| 130 | .type = MT_DEVICE |
| 131 | }, { |
| 132 | .virtual = (unsigned long)VA_L2CC_BASE, |
| 133 | .pfn = __phys_to_pfn(L2CC_BASE), |
| 134 | .length = SZ_4K, |
| 135 | .type = MT_DEVICE |
| 136 | }, |
| 137 | }; |
| 138 | |
| 139 | /* This will create static memory mapping for selected devices */ |
| 140 | void __init spear13xx_map_io(void) |
| 141 | { |
| 142 | iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc)); |
| 143 | } |
| 144 | |
| 145 | static void __init spear13xx_clk_init(void) |
| 146 | { |
| 147 | if (of_machine_is_compatible("st,spear1310")) |
| 148 | spear1310_clk_init(); |
| 149 | else if (of_machine_is_compatible("st,spear1340")) |
| 150 | spear1340_clk_init(); |
| 151 | else |
| 152 | pr_err("%s: Unknown machine\n", __func__); |
| 153 | } |
| 154 | |
| 155 | static void __init spear13xx_timer_init(void) |
| 156 | { |
| 157 | char pclk_name[] = "osc_24m_clk"; |
| 158 | struct clk *gpt_clk, *pclk; |
| 159 | |
| 160 | spear13xx_clk_init(); |
| 161 | |
| 162 | /* get the system timer clock */ |
| 163 | gpt_clk = clk_get_sys("gpt0", NULL); |
| 164 | if (IS_ERR(gpt_clk)) { |
| 165 | pr_err("%s:couldn't get clk for gpt\n", __func__); |
| 166 | BUG(); |
| 167 | } |
| 168 | |
| 169 | /* get the suitable parent clock for timer*/ |
| 170 | pclk = clk_get(NULL, pclk_name); |
| 171 | if (IS_ERR(pclk)) { |
| 172 | pr_err("%s:couldn't get %s as parent for gpt\n", __func__, |
| 173 | pclk_name); |
| 174 | BUG(); |
| 175 | } |
| 176 | |
| 177 | clk_set_parent(gpt_clk, pclk); |
| 178 | clk_put(gpt_clk); |
| 179 | clk_put(pclk); |
| 180 | |
| 181 | spear_setup_of_timer(); |
| 182 | twd_local_timer_of_register(); |
| 183 | } |
| 184 | |
| 185 | struct sys_timer spear13xx_timer = { |
| 186 | .init = spear13xx_timer_init, |
| 187 | }; |
| 188 | |
| 189 | static const struct of_device_id gic_of_match[] __initconst = { |
| 190 | { .compatible = "arm,cortex-a9-gic", .data = gic_of_init }, |
| 191 | { /* Sentinel */ } |
| 192 | }; |
| 193 | |
| 194 | void __init spear13xx_dt_init_irq(void) |
| 195 | { |
| 196 | of_irq_init(gic_of_match); |
| 197 | } |