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>
21 #include <mach/irqs.h>
24 #include <mach/mcbsp.h>
25 #include <mach/dsp_common.h>
27 #define DPS_RSTCT2_PER_EN (1 << 0)
28 #define DSP_RSTCT2_WD_PER_EN (1 << 1)
30 struct mcbsp_internal_clk
{
36 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
37 static void omap_mcbsp_clk_init(struct mcbsp_internal_clk
*mclk
)
39 const char *clk_names
[] = { "dsp_ck", "api_ck", "dspxor_ck" };
42 mclk
->n_childs
= ARRAY_SIZE(clk_names
);
43 mclk
->childs
= kzalloc(mclk
->n_childs
* sizeof(struct clk
*),
46 for (i
= 0; i
< mclk
->n_childs
; i
++) {
47 /* We fake a platform device to get correct device id */
48 struct platform_device pdev
;
50 pdev
.dev
.bus
= &platform_bus_type
;
51 pdev
.id
= mclk
->clk
.id
;
52 mclk
->childs
[i
] = clk_get(&pdev
.dev
, clk_names
[i
]);
53 if (IS_ERR(mclk
->childs
[i
]))
54 printk(KERN_ERR
"Could not get clock %s (%d).\n",
55 clk_names
[i
], mclk
->clk
.id
);
59 static int omap_mcbsp_clk_enable(struct clk
*clk
)
61 struct mcbsp_internal_clk
*mclk
= container_of(clk
,
62 struct mcbsp_internal_clk
, clk
);
65 for (i
= 0; i
< mclk
->n_childs
; i
++)
66 clk_enable(mclk
->childs
[i
]);
70 static void omap_mcbsp_clk_disable(struct clk
*clk
)
72 struct mcbsp_internal_clk
*mclk
= container_of(clk
,
73 struct mcbsp_internal_clk
, clk
);
76 for (i
= 0; i
< mclk
->n_childs
; i
++)
77 clk_disable(mclk
->childs
[i
]);
80 static struct mcbsp_internal_clk omap_mcbsp_clks
[] = {
85 .enable
= omap_mcbsp_clk_enable
,
86 .disable
= omap_mcbsp_clk_disable
,
93 .enable
= omap_mcbsp_clk_enable
,
94 .disable
= omap_mcbsp_clk_disable
,
99 #define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks)
101 #define omap_mcbsp_clks_size 0
102 static struct mcbsp_internal_clk __initdata
*omap_mcbsp_clks
;
103 static inline void omap_mcbsp_clk_init(struct mcbsp_internal_clk
*mclk
)
107 static void omap1_mcbsp_request(unsigned int id
)
110 * On 1510, 1610 and 1710, McBSP1 and McBSP3
111 * are DSP public peripherals.
113 if (id
== OMAP_MCBSP1
|| id
== OMAP_MCBSP3
) {
114 omap_dsp_request_mem();
116 * DSP external peripheral reset
117 * FIXME: This should be moved to dsp code
119 __raw_writew(__raw_readw(DSP_RSTCT2
) | DPS_RSTCT2_PER_EN
|
120 DSP_RSTCT2_WD_PER_EN
, DSP_RSTCT2
);
124 static void omap1_mcbsp_free(unsigned int id
)
126 if (id
== OMAP_MCBSP1
|| id
== OMAP_MCBSP3
)
127 omap_dsp_release_mem();
130 static struct omap_mcbsp_ops omap1_mcbsp_ops
= {
131 .request
= omap1_mcbsp_request
,
132 .free
= omap1_mcbsp_free
,
135 #ifdef CONFIG_ARCH_OMAP730
136 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata
[] = {
138 .phys_base
= OMAP730_MCBSP1_BASE
,
139 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
140 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
141 .rx_irq
= INT_730_McBSP1RX
,
142 .tx_irq
= INT_730_McBSP1TX
,
143 .ops
= &omap1_mcbsp_ops
,
146 .phys_base
= OMAP730_MCBSP2_BASE
,
147 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
148 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
149 .rx_irq
= INT_730_McBSP2RX
,
150 .tx_irq
= INT_730_McBSP2TX
,
151 .ops
= &omap1_mcbsp_ops
,
154 #define OMAP730_MCBSP_PDATA_SZ ARRAY_SIZE(omap730_mcbsp_pdata)
156 #define omap730_mcbsp_pdata NULL
157 #define OMAP730_MCBSP_PDATA_SZ 0
160 #ifdef CONFIG_ARCH_OMAP15XX
161 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata
[] = {
163 .phys_base
= OMAP1510_MCBSP1_BASE
,
164 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
165 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
166 .rx_irq
= INT_McBSP1RX
,
167 .tx_irq
= INT_McBSP1TX
,
168 .ops
= &omap1_mcbsp_ops
,
169 .clk_name
= "mcbsp_clk",
172 .phys_base
= OMAP1510_MCBSP2_BASE
,
173 .dma_rx_sync
= OMAP_DMA_MCBSP2_RX
,
174 .dma_tx_sync
= OMAP_DMA_MCBSP2_TX
,
175 .rx_irq
= INT_1510_SPI_RX
,
176 .tx_irq
= INT_1510_SPI_TX
,
177 .ops
= &omap1_mcbsp_ops
,
180 .phys_base
= OMAP1510_MCBSP3_BASE
,
181 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
182 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
183 .rx_irq
= INT_McBSP3RX
,
184 .tx_irq
= INT_McBSP3TX
,
185 .ops
= &omap1_mcbsp_ops
,
186 .clk_name
= "mcbsp_clk",
189 #define OMAP15XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap15xx_mcbsp_pdata)
191 #define omap15xx_mcbsp_pdata NULL
192 #define OMAP15XX_MCBSP_PDATA_SZ 0
195 #ifdef CONFIG_ARCH_OMAP16XX
196 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata
[] = {
198 .phys_base
= OMAP1610_MCBSP1_BASE
,
199 .dma_rx_sync
= OMAP_DMA_MCBSP1_RX
,
200 .dma_tx_sync
= OMAP_DMA_MCBSP1_TX
,
201 .rx_irq
= INT_McBSP1RX
,
202 .tx_irq
= INT_McBSP1TX
,
203 .ops
= &omap1_mcbsp_ops
,
204 .clk_name
= "mcbsp_clk",
207 .phys_base
= OMAP1610_MCBSP2_BASE
,
208 .dma_rx_sync
= OMAP_DMA_MCBSP2_RX
,
209 .dma_tx_sync
= OMAP_DMA_MCBSP2_TX
,
210 .rx_irq
= INT_1610_McBSP2_RX
,
211 .tx_irq
= INT_1610_McBSP2_TX
,
212 .ops
= &omap1_mcbsp_ops
,
215 .phys_base
= OMAP1610_MCBSP3_BASE
,
216 .dma_rx_sync
= OMAP_DMA_MCBSP3_RX
,
217 .dma_tx_sync
= OMAP_DMA_MCBSP3_TX
,
218 .rx_irq
= INT_McBSP3RX
,
219 .tx_irq
= INT_McBSP3TX
,
220 .ops
= &omap1_mcbsp_ops
,
221 .clk_name
= "mcbsp_clk",
224 #define OMAP16XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap16xx_mcbsp_pdata)
226 #define omap16xx_mcbsp_pdata NULL
227 #define OMAP16XX_MCBSP_PDATA_SZ 0
230 int __init
omap1_mcbsp_init(void)
234 for (i
= 0; i
< omap_mcbsp_clks_size
; i
++) {
235 if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
236 omap_mcbsp_clk_init(&omap_mcbsp_clks
[i
]);
237 clk_register(&omap_mcbsp_clks
[i
].clk
);
241 if (cpu_is_omap730())
242 omap_mcbsp_count
= OMAP730_MCBSP_PDATA_SZ
;
243 if (cpu_is_omap15xx())
244 omap_mcbsp_count
= OMAP15XX_MCBSP_PDATA_SZ
;
245 if (cpu_is_omap16xx())
246 omap_mcbsp_count
= OMAP16XX_MCBSP_PDATA_SZ
;
248 mcbsp_ptr
= kzalloc(omap_mcbsp_count
* sizeof(struct omap_mcbsp
*),
253 if (cpu_is_omap730())
254 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata
,
255 OMAP730_MCBSP_PDATA_SZ
);
257 if (cpu_is_omap15xx())
258 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata
,
259 OMAP15XX_MCBSP_PDATA_SZ
);
261 if (cpu_is_omap16xx())
262 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata
,
263 OMAP16XX_MCBSP_PDATA_SZ
);
265 return omap_mcbsp_init();
268 arch_initcall(omap1_mcbsp_init
);