2 * arch/arm/mach-spear13xx/spear13xx.c
4 * SPEAr13XX machines common source file
6 * Copyright (C) 2012 ST Microelectronics
7 * Viresh Kumar <viresh.linux@gmail.com>
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.
14 #define pr_fmt(fmt) "SPEAr13xx: " fmt
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>
26 #include <mach/generic.h>
27 #include <mach/spear.h>
29 /* common dw_dma filter routine to be used by peripherals */
30 bool dw_dma_filter(struct dma_chan *chan, void *slave)
32 struct dw_dma_slave *dws = (struct dw_dma_slave *)slave;
34 if (chan->device->dev == dws->dma_dev) {
35 chan->private = slave;
42 /* ssp device registration */
43 static struct dw_dma_slave ssp_dma_param[] = {
46 .cfg_hi = DWC_CFGH_DST_PER(DMA_REQ_SSP0_TX),
48 .src_master = DMA_MASTER_MEMORY,
49 .dst_master = DMA_MASTER_SSP0,
52 .cfg_hi = DWC_CFGH_SRC_PER(DMA_REQ_SSP0_RX),
54 .src_master = DMA_MASTER_SSP0,
55 .dst_master = DMA_MASTER_MEMORY,
59 struct pl022_ssp_controller pl022_plat_data = {
62 .dma_filter = dw_dma_filter,
63 .dma_rx_param = &ssp_dma_param[1],
64 .dma_tx_param = &ssp_dma_param[0],
68 /* CF device registration */
69 struct dw_dma_slave cf_dma_priv = {
76 /* dmac device registeration */
77 struct dw_dma_platform_data dmac_plat_data = {
79 .chan_allocation_order = CHAN_ALLOCATION_DESCENDING,
80 .chan_priority = CHAN_PRIORITY_DESCENDING,
83 .data_width = { 3, 3, 0, 0 },
86 void __init spear13xx_l2x0_init(void)
89 * 512KB (64KB/way), 8-way associativity, parity supported
91 * FIXME: 9th bit, of Auxillary Controller register must be set
92 * for some spear13xx devices for stable L2 operation.
94 * Enable Early BRESP, L2 prefetch for Instruction and Data,
95 * write alloc and 'Full line of zero' options
99 writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL);
102 * Program following latencies in order to make
103 * SPEAr1340 work at 600 MHz
105 writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL);
106 writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL);
107 l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff);
111 * Following will create 16MB static virtual/physical mappings
113 * 0xB3000000 0xFE000000
114 * 0xE0000000 0xFD000000
115 * 0xEC000000 0xFC000000
116 * 0xED000000 0xFB000000
118 struct map_desc spear13xx_io_desc[] __initdata = {
120 .virtual = (unsigned long)VA_PERIP_GRP2_BASE,
121 .pfn = __phys_to_pfn(PERIP_GRP2_BASE),
125 .virtual = (unsigned long)VA_PERIP_GRP1_BASE,
126 .pfn = __phys_to_pfn(PERIP_GRP1_BASE),
130 .virtual = (unsigned long)VA_A9SM_AND_MPMC_BASE,
131 .pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE),
135 .virtual = (unsigned long)VA_L2CC_BASE,
136 .pfn = __phys_to_pfn(L2CC_BASE),
142 /* This will create static memory mapping for selected devices */
143 void __init spear13xx_map_io(void)
145 iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc));
148 static void __init spear13xx_clk_init(void)
150 if (of_machine_is_compatible("st,spear1310"))
151 spear1310_clk_init();
152 else if (of_machine_is_compatible("st,spear1340"))
153 spear1340_clk_init();
155 pr_err("%s: Unknown machine\n", __func__);
158 static void __init spear13xx_timer_init(void)
160 char pclk_name[] = "osc_24m_clk";
161 struct clk *gpt_clk, *pclk;
163 spear13xx_clk_init();
165 /* get the system timer clock */
166 gpt_clk = clk_get_sys("gpt0", NULL);
167 if (IS_ERR(gpt_clk)) {
168 pr_err("%s:couldn't get clk for gpt\n", __func__);
172 /* get the suitable parent clock for timer*/
173 pclk = clk_get(NULL, pclk_name);
175 pr_err("%s:couldn't get %s as parent for gpt\n", __func__,
180 clk_set_parent(gpt_clk, pclk);
184 spear_setup_of_timer();
185 twd_local_timer_of_register();
188 struct sys_timer spear13xx_timer = {
189 .init = spear13xx_timer_init,
192 static const struct of_device_id gic_of_match[] __initconst = {
193 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
197 void __init spear13xx_dt_init_irq(void)
199 of_irq_init(gic_of_match);