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 void __init
spear13xx_l2x0_init(void)
86 * 512KB (64KB/way), 8-way associativity, parity supported
88 * FIXME: 9th bit, of Auxillary Controller register must be set
89 * for some spear13xx devices for stable L2 operation.
91 * Enable Early BRESP, L2 prefetch for Instruction and Data,
92 * write alloc and 'Full line of zero' options
96 writel_relaxed(0x06, VA_L2CC_BASE
+ L2X0_PREFETCH_CTRL
);
99 * Program following latencies in order to make
100 * SPEAr1340 work at 600 MHz
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);
108 * Following will create 16MB static virtual/physical mappings
110 * 0xB3000000 0xFE000000
111 * 0xE0000000 0xFD000000
112 * 0xEC000000 0xFC000000
113 * 0xED000000 0xFB000000
115 struct map_desc spear13xx_io_desc
[] __initdata
= {
117 .virtual = VA_PERIP_GRP2_BASE
,
118 .pfn
= __phys_to_pfn(PERIP_GRP2_BASE
),
122 .virtual = VA_PERIP_GRP1_BASE
,
123 .pfn
= __phys_to_pfn(PERIP_GRP1_BASE
),
127 .virtual = VA_A9SM_AND_MPMC_BASE
,
128 .pfn
= __phys_to_pfn(A9SM_AND_MPMC_BASE
),
132 .virtual = (unsigned long)VA_L2CC_BASE
,
133 .pfn
= __phys_to_pfn(L2CC_BASE
),
139 /* This will create static memory mapping for selected devices */
140 void __init
spear13xx_map_io(void)
142 iotable_init(spear13xx_io_desc
, ARRAY_SIZE(spear13xx_io_desc
));
145 static void __init
spear13xx_clk_init(void)
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();
152 pr_err("%s: Unknown machine\n", __func__
);
155 static void __init
spear13xx_timer_init(void)
157 char pclk_name
[] = "osc_24m_clk";
158 struct clk
*gpt_clk
, *pclk
;
160 spear13xx_clk_init();
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__
);
169 /* get the suitable parent clock for timer*/
170 pclk
= clk_get(NULL
, pclk_name
);
172 pr_err("%s:couldn't get %s as parent for gpt\n", __func__
,
177 clk_set_parent(gpt_clk
, pclk
);
181 spear_setup_of_timer();
182 twd_local_timer_of_register();
185 struct sys_timer spear13xx_timer
= {
186 .init
= spear13xx_timer_init
,
189 static const struct of_device_id gic_of_match
[] __initconst
= {
190 { .compatible
= "arm,cortex-a9-gic", .data
= gic_of_init
},
194 void __init
spear13xx_dt_init_irq(void)
196 of_irq_init(gic_of_match
);