2 * linux/arch/arm/mach-omap1/mcbsp.c
4 * Copyright (C) 2008 Instituto Nokia de Tecnologia
5 * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
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.
11 * Multichannel mode not supported.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/clk.h>
16 #include <linux/err.h>
18 #include <linux/platform_device.h>
23 #include <mach/mcbsp.h>
24 #include <mach/dsp_common.h>
26 #define DPS_RSTCT2_PER_EN (1 << 0)
27 #define DSP_RSTCT2_WD_PER_EN (1 << 1)
29 struct mcbsp_internal_clk
{
35 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
36 static void omap_mcbsp_clk_init(struct mcbsp_internal_clk
*mclk
)
38 const char *clk_names
[] = { "dsp_ck", "api_ck", "dspxor_ck" };
41 mclk
->n_childs
= ARRAY_SIZE(clk_names
);
42 mclk
->childs
= kzalloc(mclk
->n_childs
* sizeof(struct clk
*),
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
;
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
);
58 static int omap_mcbsp_clk_enable(struct clk
*clk
)
60 struct mcbsp_internal_clk
*mclk
= container_of(clk
,
61 struct mcbsp_internal_clk
, clk
);
64 for (i
= 0; i
< mclk
->n_childs
; i
++)
65 clk_enable(mclk
->childs
[i
]);
69 static void omap_mcbsp_clk_disable(struct clk
*clk
)
71 struct mcbsp_internal_clk
*mclk
= container_of(clk
,
72 struct mcbsp_internal_clk
, clk
);
75 for (i
= 0; i
< mclk
->n_childs
; i
++)
76 clk_disable(mclk
->childs
[i
]);
79 static struct mcbsp_internal_clk omap_mcbsp_clks
[] = {
84 .enable
= omap_mcbsp_clk_enable
,
85 .disable
= omap_mcbsp_clk_disable
,
92 .enable
= omap_mcbsp_clk_enable
,
93 .disable
= omap_mcbsp_clk_disable
,
98 #define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks)
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
)
106 static void omap1_mcbsp_request(unsigned int id
)
109 * On 1510, 1610 and 1710, McBSP1 and McBSP3
110 * are DSP public peripherals.
112 if (id
== OMAP_MCBSP1
|| id
== OMAP_MCBSP3
) {
113 omap_dsp_request_mem();
115 * DSP external peripheral reset
116 * FIXME: This should be moved to dsp code
118 __raw_writew(__raw_readw(DSP_RSTCT2
) | DPS_RSTCT2_PER_EN
|
119 DSP_RSTCT2_WD_PER_EN
, DSP_RSTCT2
);
123 static void omap1_mcbsp_free(unsigned int id
)
125 if (id
== OMAP_MCBSP1
|| id
== OMAP_MCBSP3
)
126 omap_dsp_release_mem();
129 static struct omap_mcbsp_ops omap1_mcbsp_ops
= {
130 .request
= omap1_mcbsp_request
,
131 .free
= omap1_mcbsp_free
,
134 #ifdef CONFIG_ARCH_OMAP730
135 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata
[] = {
137 .phys_base
= OMAP730_MCBSP1_BASE
,
138 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
139 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
140 .rx_irq
= INT_730_McBSP1RX
,
141 .tx_irq
= INT_730_McBSP1TX
,
142 .ops
= &omap1_mcbsp_ops
,
145 .phys_base
= OMAP730_MCBSP2_BASE
,
146 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
147 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
148 .rx_irq
= INT_730_McBSP2RX
,
149 .tx_irq
= INT_730_McBSP2TX
,
150 .ops
= &omap1_mcbsp_ops
,
153 #define OMAP730_MCBSP_PDATA_SZ ARRAY_SIZE(omap730_mcbsp_pdata)
155 #define omap730_mcbsp_pdata NULL
156 #define OMAP730_MCBSP_PDATA_SZ 0
159 #ifdef CONFIG_ARCH_OMAP15XX
160 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata
[] = {
162 .phys_base
= OMAP1510_MCBSP1_BASE
,
163 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
164 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
165 .rx_irq
= INT_McBSP1RX
,
166 .tx_irq
= INT_McBSP1TX
,
167 .ops
= &omap1_mcbsp_ops
,
168 .clk_name
= "mcbsp_clk",
171 .phys_base
= OMAP1510_MCBSP2_BASE
,
172 .dma_rx_sync
= OMAP_DMA_MCBSP2_RX
,
173 .dma_tx_sync
= OMAP_DMA_MCBSP2_TX
,
174 .rx_irq
= INT_1510_SPI_RX
,
175 .tx_irq
= INT_1510_SPI_TX
,
176 .ops
= &omap1_mcbsp_ops
,
179 .phys_base
= OMAP1510_MCBSP3_BASE
,
180 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
181 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
182 .rx_irq
= INT_McBSP3RX
,
183 .tx_irq
= INT_McBSP3TX
,
184 .ops
= &omap1_mcbsp_ops
,
185 .clk_name
= "mcbsp_clk",
188 #define OMAP15XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap15xx_mcbsp_pdata)
190 #define omap15xx_mcbsp_pdata NULL
191 #define OMAP15XX_MCBSP_PDATA_SZ 0
194 #ifdef CONFIG_ARCH_OMAP16XX
195 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata
[] = {
197 .phys_base
= OMAP1610_MCBSP1_BASE
,
198 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
199 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
200 .rx_irq
= INT_McBSP1RX
,
201 .tx_irq
= INT_McBSP1TX
,
202 .ops
= &omap1_mcbsp_ops
,
203 .clk_name
= "mcbsp_clk",
206 .phys_base
= OMAP1610_MCBSP2_BASE
,
207 .dma_rx_sync
= OMAP_DMA_MCBSP2_RX
,
208 .dma_tx_sync
= OMAP_DMA_MCBSP2_TX
,
209 .rx_irq
= INT_1610_McBSP2_RX
,
210 .tx_irq
= INT_1610_McBSP2_TX
,
211 .ops
= &omap1_mcbsp_ops
,
214 .phys_base
= OMAP1610_MCBSP3_BASE
,
215 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
216 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
217 .rx_irq
= INT_McBSP3RX
,
218 .tx_irq
= INT_McBSP3TX
,
219 .ops
= &omap1_mcbsp_ops
,
220 .clk_name
= "mcbsp_clk",
223 #define OMAP16XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap16xx_mcbsp_pdata)
225 #define omap16xx_mcbsp_pdata NULL
226 #define OMAP16XX_MCBSP_PDATA_SZ 0
229 int __init
omap1_mcbsp_init(void)
233 for (i
= 0; i
< omap_mcbsp_clks_size
; i
++) {
234 if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
235 omap_mcbsp_clk_init(&omap_mcbsp_clks
[i
]);
236 clk_register(&omap_mcbsp_clks
[i
].clk
);
240 if (cpu_is_omap730())
241 omap_mcbsp_count
= OMAP730_MCBSP_PDATA_SZ
;
242 if (cpu_is_omap15xx())
243 omap_mcbsp_count
= OMAP15XX_MCBSP_PDATA_SZ
;
244 if (cpu_is_omap16xx())
245 omap_mcbsp_count
= OMAP16XX_MCBSP_PDATA_SZ
;
247 mcbsp_ptr
= kzalloc(omap_mcbsp_count
* sizeof(struct omap_mcbsp
*),
252 if (cpu_is_omap730())
253 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata
,
254 OMAP730_MCBSP_PDATA_SZ
);
256 if (cpu_is_omap15xx())
257 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata
,
258 OMAP15XX_MCBSP_PDATA_SZ
);
260 if (cpu_is_omap16xx())
261 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata
,
262 OMAP16XX_MCBSP_PDATA_SZ
);
264 return omap_mcbsp_init();
267 arch_initcall(omap1_mcbsp_init
);