[ARM] omap: convert mcbsp to use ioremap()
[linux-3.10.git] / arch / arm / mach-omap1 / mcbsp.c
1 /*
2  * linux/arch/arm/mach-omap1/mcbsp.c
3  *
4  * Copyright (C) 2008 Instituto Nokia de Tecnologia
5  * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * Multichannel mode not supported.
12  */
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/clk.h>
16 #include <linux/err.h>
17 #include <linux/io.h>
18 #include <linux/platform_device.h>
19
20 #include <mach/dma.h>
21 #include <mach/mux.h>
22 #include <mach/cpu.h>
23 #include <mach/mcbsp.h>
24 #include <mach/dsp_common.h>
25
26 #define DPS_RSTCT2_PER_EN       (1 << 0)
27 #define DSP_RSTCT2_WD_PER_EN    (1 << 1)
28
29 struct mcbsp_internal_clk {
30         struct clk clk;
31         struct clk **childs;
32         int n_childs;
33 };
34
35 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
36 static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
37 {
38         const char *clk_names[] = { "dsp_ck", "api_ck", "dspxor_ck" };
39         int i;
40
41         mclk->n_childs = ARRAY_SIZE(clk_names);
42         mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *),
43                                 GFP_KERNEL);
44
45         for (i = 0; i < mclk->n_childs; i++) {
46                 /* We fake a platform device to get correct device id */
47                 struct platform_device pdev;
48
49                 pdev.dev.bus = &platform_bus_type;
50                 pdev.id = mclk->clk.id;
51                 mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]);
52                 if (IS_ERR(mclk->childs[i]))
53                         printk(KERN_ERR "Could not get clock %s (%d).\n",
54                                 clk_names[i], mclk->clk.id);
55         }
56 }
57
58 static int omap_mcbsp_clk_enable(struct clk *clk)
59 {
60         struct mcbsp_internal_clk *mclk = container_of(clk,
61                                         struct mcbsp_internal_clk, clk);
62         int i;
63
64         for (i = 0; i < mclk->n_childs; i++)
65                 clk_enable(mclk->childs[i]);
66         return 0;
67 }
68
69 static void omap_mcbsp_clk_disable(struct clk *clk)
70 {
71         struct mcbsp_internal_clk *mclk = container_of(clk,
72                                         struct mcbsp_internal_clk, clk);
73         int i;
74
75         for (i = 0; i < mclk->n_childs; i++)
76                 clk_disable(mclk->childs[i]);
77 }
78
79 static struct mcbsp_internal_clk omap_mcbsp_clks[] = {
80         {
81                 .clk = {
82                         .name           = "mcbsp_clk",
83                         .id             = 1,
84                         .enable         = omap_mcbsp_clk_enable,
85                         .disable        = omap_mcbsp_clk_disable,
86                 },
87         },
88         {
89                 .clk = {
90                         .name           = "mcbsp_clk",
91                         .id             = 3,
92                         .enable         = omap_mcbsp_clk_enable,
93                         .disable        = omap_mcbsp_clk_disable,
94                 },
95         },
96 };
97
98 #define omap_mcbsp_clks_size    ARRAY_SIZE(omap_mcbsp_clks)
99 #else
100 #define omap_mcbsp_clks_size    0
101 static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks;
102 static inline void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
103 { }
104 #endif
105
106 static int omap1_mcbsp_check(unsigned int id)
107 {
108         /* REVISIT: Check correctly for number of registered McBSPs */
109         if (cpu_is_omap730()) {
110                 if (id > OMAP_MAX_MCBSP_COUNT - 2) {
111                        printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
112                                 id + 1);
113                        return -ENODEV;
114                 }
115                 return 0;
116         }
117
118         if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
119                 if (id > OMAP_MAX_MCBSP_COUNT - 1) {
120                         printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
121                                 id + 1);
122                         return -ENODEV;
123                 }
124                 return 0;
125         }
126
127         return -ENODEV;
128 }
129
130 static void omap1_mcbsp_request(unsigned int id)
131 {
132         /*
133          * On 1510, 1610 and 1710, McBSP1 and McBSP3
134          * are DSP public peripherals.
135          */
136         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
137                 omap_dsp_request_mem();
138                 /*
139                  * DSP external peripheral reset
140                  * FIXME: This should be moved to dsp code
141                  */
142                 __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
143                                 DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
144         }
145 }
146
147 static void omap1_mcbsp_free(unsigned int id)
148 {
149         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
150                 omap_dsp_release_mem();
151 }
152
153 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
154         .check          = omap1_mcbsp_check,
155         .request        = omap1_mcbsp_request,
156         .free           = omap1_mcbsp_free,
157 };
158
159 #ifdef CONFIG_ARCH_OMAP730
160 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
161         {
162                 .phys_base      = OMAP730_MCBSP1_BASE,
163                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
164                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
165                 .rx_irq         = INT_730_McBSP1RX,
166                 .tx_irq         = INT_730_McBSP1TX,
167                 .ops            = &omap1_mcbsp_ops,
168         },
169         {
170                 .phys_base      = OMAP730_MCBSP2_BASE,
171                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
172                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
173                 .rx_irq         = INT_730_McBSP2RX,
174                 .tx_irq         = INT_730_McBSP2TX,
175                 .ops            = &omap1_mcbsp_ops,
176         },
177 };
178 #define OMAP730_MCBSP_PDATA_SZ          ARRAY_SIZE(omap730_mcbsp_pdata)
179 #else
180 #define omap730_mcbsp_pdata             NULL
181 #define OMAP730_MCBSP_PDATA_SZ          0
182 #endif
183
184 #ifdef CONFIG_ARCH_OMAP15XX
185 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
186         {
187                 .phys_base      = OMAP1510_MCBSP1_BASE,
188                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
189                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
190                 .rx_irq         = INT_McBSP1RX,
191                 .tx_irq         = INT_McBSP1TX,
192                 .ops            = &omap1_mcbsp_ops,
193                 .clk_name       = "mcbsp_clk",
194                 },
195         {
196                 .phys_base      = OMAP1510_MCBSP2_BASE,
197                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
198                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
199                 .rx_irq         = INT_1510_SPI_RX,
200                 .tx_irq         = INT_1510_SPI_TX,
201                 .ops            = &omap1_mcbsp_ops,
202         },
203         {
204                 .phys_base      = OMAP1510_MCBSP3_BASE,
205                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
206                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
207                 .rx_irq         = INT_McBSP3RX,
208                 .tx_irq         = INT_McBSP3TX,
209                 .ops            = &omap1_mcbsp_ops,
210                 .clk_name       = "mcbsp_clk",
211         },
212 };
213 #define OMAP15XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap15xx_mcbsp_pdata)
214 #else
215 #define omap15xx_mcbsp_pdata            NULL
216 #define OMAP15XX_MCBSP_PDATA_SZ         0
217 #endif
218
219 #ifdef CONFIG_ARCH_OMAP16XX
220 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
221         {
222                 .phys_base      = OMAP1610_MCBSP1_BASE,
223                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
224                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
225                 .rx_irq         = INT_McBSP1RX,
226                 .tx_irq         = INT_McBSP1TX,
227                 .ops            = &omap1_mcbsp_ops,
228                 .clk_name       = "mcbsp_clk",
229         },
230         {
231                 .phys_base      = OMAP1610_MCBSP2_BASE,
232                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
233                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
234                 .rx_irq         = INT_1610_McBSP2_RX,
235                 .tx_irq         = INT_1610_McBSP2_TX,
236                 .ops            = &omap1_mcbsp_ops,
237         },
238         {
239                 .phys_base      = OMAP1610_MCBSP3_BASE,
240                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
241                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
242                 .rx_irq         = INT_McBSP3RX,
243                 .tx_irq         = INT_McBSP3TX,
244                 .ops            = &omap1_mcbsp_ops,
245                 .clk_name       = "mcbsp_clk",
246         },
247 };
248 #define OMAP16XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap16xx_mcbsp_pdata)
249 #else
250 #define omap16xx_mcbsp_pdata            NULL
251 #define OMAP16XX_MCBSP_PDATA_SZ         0
252 #endif
253
254 int __init omap1_mcbsp_init(void)
255 {
256         int i;
257
258         for (i = 0; i < omap_mcbsp_clks_size; i++) {
259                 if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
260                         omap_mcbsp_clk_init(&omap_mcbsp_clks[i]);
261                         clk_register(&omap_mcbsp_clks[i].clk);
262                 }
263         }
264
265         if (cpu_is_omap730())
266                 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
267                                                 OMAP730_MCBSP_PDATA_SZ);
268
269         if (cpu_is_omap15xx())
270                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
271                                                 OMAP15XX_MCBSP_PDATA_SZ);
272
273         if (cpu_is_omap16xx())
274                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
275                                                 OMAP16XX_MCBSP_PDATA_SZ);
276
277         return omap_mcbsp_init();
278 }
279
280 arch_initcall(omap1_mcbsp_init);