]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - arch/arm/mach-spear/spear3xx.c
d7580f2e5e07c34751e3bd4583ff9f0ae3f17815
[karo-tx-linux.git] / 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 <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) "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 <plat/pl080.h>
22 #include <mach/generic.h>
23 #include <mach/spear.h>
24
25 /* ssp device registration */
26 struct pl022_ssp_controller pl022_plat_data = {
27         .bus_id = 0,
28         .enable_dma = 1,
29         .dma_filter = pl08x_filter_id,
30         .dma_tx_param = "ssp0_tx",
31         .dma_rx_param = "ssp0_rx",
32         /*
33          * This is number of spi devices that can be connected to spi. There are
34          * two type of chipselects on which slave devices can work. One is chip
35          * select provided by spi masters other is controlled through external
36          * gpio's. We can't use chipselect provided from spi master (because as
37          * soon as FIFO becomes empty, CS is disabled and transfer ends). So
38          * this number now depends on number of gpios available for spi. each
39          * slave on each master requires a separate gpio pin.
40          */
41         .num_chipselect = 2,
42 };
43
44 /* dmac device registration */
45 struct pl08x_platform_data pl080_plat_data = {
46         .memcpy_channel = {
47                 .bus_id = "memcpy",
48                 .cctl_memcpy =
49                         (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
50                         PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
51                         PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
52                         PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
53                         PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \
54                         PL080_CONTROL_PROT_SYS),
55         },
56         .lli_buses = PL08X_AHB1,
57         .mem_buses = PL08X_AHB1,
58         .get_signal = pl080_get_signal,
59         .put_signal = pl080_put_signal,
60 };
61
62 /*
63  * Following will create 16MB static virtual/physical mappings
64  * PHYSICAL             VIRTUAL
65  * 0xD0000000           0xFD000000
66  * 0xFC000000           0xFC000000
67  */
68 struct map_desc spear3xx_io_desc[] __initdata = {
69         {
70                 .virtual        = VA_SPEAR_ICM1_2_BASE,
71                 .pfn            = __phys_to_pfn(SPEAR_ICM1_2_BASE),
72                 .length         = SZ_16M,
73                 .type           = MT_DEVICE
74         }, {
75                 .virtual        = VA_SPEAR_ICM3_SMI_CTRL_BASE,
76                 .pfn            = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
77                 .length         = SZ_16M,
78                 .type           = MT_DEVICE
79         },
80 };
81
82 /* This will create static memory mapping for selected devices */
83 void __init spear3xx_map_io(void)
84 {
85         iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
86 }
87
88 void __init spear3xx_timer_init(void)
89 {
90         char pclk_name[] = "pll3_clk";
91         struct clk *gpt_clk, *pclk;
92
93         spear3xx_clk_init();
94
95         /* get the system timer clock */
96         gpt_clk = clk_get_sys("gpt0", NULL);
97         if (IS_ERR(gpt_clk)) {
98                 pr_err("%s:couldn't get clk for gpt\n", __func__);
99                 BUG();
100         }
101
102         /* get the suitable parent clock for timer*/
103         pclk = clk_get(NULL, pclk_name);
104         if (IS_ERR(pclk)) {
105                 pr_err("%s:couldn't get %s as parent for gpt\n",
106                                 __func__, pclk_name);
107                 BUG();
108         }
109
110         clk_set_parent(gpt_clk, pclk);
111         clk_put(gpt_clk);
112         clk_put(pclk);
113
114         spear_setup_of_timer();
115 }