2 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
3 * Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #include <linux/kernel.h>
21 #include <linux/scatterlist.h>
25 /* #define SOLO_TEST_P2M */
27 int solo_p2m_dma(struct solo6010_dev
*solo_dev
, u8 id
, int wr
,
28 void *sys_addr
, u32 ext_addr
, u32 size
)
34 BUG_ON(id
>= SOLO_NR_P2M
);
39 dma_addr
= pci_map_single(solo_dev
->pdev
, sys_addr
, size
,
40 wr
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
42 ret
= solo_p2m_dma_t(solo_dev
, id
, wr
, dma_addr
, ext_addr
, size
);
44 pci_unmap_single(solo_dev
->pdev
, dma_addr
, size
,
45 wr
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
50 int solo_p2m_dma_t(struct solo6010_dev
*solo_dev
, u8 id
, int wr
,
51 dma_addr_t dma_addr
, u32 ext_addr
, u32 size
)
53 struct p2m_desc
*desc
= kzalloc(sizeof(*desc
) * 2, GFP_DMA
);
59 solo_p2m_push_desc(&desc
[1], wr
, dma_addr
, ext_addr
, size
, 0, 0);
60 ret
= solo_p2m_dma_desc(solo_dev
, id
, desc
, 2);
66 void solo_p2m_push_desc(struct p2m_desc
*desc
, int wr
, dma_addr_t dma_addr
,
67 u32 ext_addr
, u32 size
, int repeat
, u32 ext_size
)
72 desc
->ext
= SOLO_P2M_COPY_SIZE(size
>> 2);
73 desc
->ctrl
= SOLO_P2M_BURST_SIZE(SOLO_P2M_BURST_256
) |
74 (wr
? SOLO_P2M_WRITE
: 0) | SOLO_P2M_TRANS_ON
;
76 /* Ext size only matters when we're repeating */
78 desc
->ext
|= SOLO_P2M_EXT_INC(ext_size
>> 2);
79 desc
->ctrl
|= SOLO_P2M_PCI_INC(size
>> 2) |
80 SOLO_P2M_REPEAT(repeat
);
84 int solo_p2m_dma_desc(struct solo6010_dev
*solo_dev
, u8 id
,
85 struct p2m_desc
*desc
, int desc_count
)
87 struct solo_p2m_dev
*p2m_dev
;
91 dma_addr_t desc_dma
= 0;
93 BUG_ON(id
>= SOLO_NR_P2M
);
94 BUG_ON(!desc_count
|| desc_count
> SOLO_NR_P2M_DESC
);
96 p2m_dev
= &solo_dev
->p2m_dev
[id
];
98 mutex_lock(&p2m_dev
->mutex
);
100 solo_reg_write(solo_dev
, SOLO_P2M_CONTROL(id
), 0);
102 INIT_COMPLETION(p2m_dev
->completion
);
105 /* Enable the descriptors */
106 config
= solo_reg_read(solo_dev
, SOLO_P2M_CONFIG(id
));
107 desc_dma
= pci_map_single(solo_dev
->pdev
, desc
,
108 desc_count
* sizeof(*desc
),
110 solo_reg_write(solo_dev
, SOLO_P2M_DES_ADR(id
), desc_dma
);
111 solo_reg_write(solo_dev
, SOLO_P2M_DESC_ID(id
), desc_count
- 1);
112 solo_reg_write(solo_dev
, SOLO_P2M_CONFIG(id
), config
|
115 /* Should have all descriptors completed from one interrupt */
116 timeout
= wait_for_completion_timeout(&p2m_dev
->completion
, HZ
);
118 solo_reg_write(solo_dev
, SOLO_P2M_CONTROL(id
), 0);
120 /* Reset back to non-descriptor mode */
121 solo_reg_write(solo_dev
, SOLO_P2M_CONFIG(id
), config
);
122 solo_reg_write(solo_dev
, SOLO_P2M_DESC_ID(id
), 0);
123 solo_reg_write(solo_dev
, SOLO_P2M_DES_ADR(id
), 0);
124 pci_unmap_single(solo_dev
->pdev
, desc_dma
,
125 desc_count
* sizeof(*desc
),
130 else if (timeout
== 0)
133 mutex_unlock(&p2m_dev
->mutex
);
140 int solo_p2m_dma_sg(struct solo6010_dev
*solo_dev
, u8 id
,
141 struct p2m_desc
*pdesc
, int wr
,
142 struct scatterlist
*sg
, u32 sg_off
,
143 u32 ext_addr
, u32 size
)
148 BUG_ON(id
>= SOLO_NR_P2M
);
150 if (WARN_ON_ONCE(!size
))
153 memset(pdesc
, 0, sizeof(*pdesc
));
155 /* Should rewrite this to handle > SOLO_NR_P2M_DESC transactions */
156 for (i
= 0, idx
= 1; idx
< SOLO_NR_P2M_DESC
&& sg
&& size
> 0;
157 i
++, sg
= sg_next(sg
)) {
158 struct p2m_desc
*desc
= &pdesc
[idx
];
159 u32 sg_len
= sg_dma_len(sg
);
162 if (sg_off
>= sg_len
) {
168 len
= min(sg_len
, size
);
170 solo_p2m_push_desc(desc
, wr
, sg_dma_address(sg
) + sg_off
,
171 ext_addr
, len
, 0, 0);
180 WARN_ON_ONCE(size
|| i
>= SOLO_NR_P2M_DESC
);
182 return solo_p2m_dma_desc(solo_dev
, id
, pdesc
, idx
);
187 #define P2M_TEST_CHAR 0xbe
189 static unsigned long long p2m_test(struct solo6010_dev
*solo_dev
, u8 id
,
195 unsigned long long err_cnt
= 0;
197 wr_buf
= kmalloc(size
, GFP_KERNEL
);
199 printk(SOLO6010_NAME
": Failed to malloc for p2m_test\n");
203 rd_buf
= kmalloc(size
, GFP_KERNEL
);
205 printk(SOLO6010_NAME
": Failed to malloc for p2m_test\n");
210 memset(wr_buf
, P2M_TEST_CHAR
, size
);
211 memset(rd_buf
, P2M_TEST_CHAR
+ 1, size
);
213 solo_p2m_dma(solo_dev
, id
, 1, wr_buf
, base
, size
);
214 solo_p2m_dma(solo_dev
, id
, 0, rd_buf
, base
, size
);
216 for (i
= 0; i
< size
; i
++)
217 if (wr_buf
[i
] != rd_buf
[i
])
226 #define TEST_CHUNK_SIZE (8 * 1024)
228 static void run_p2m_test(struct solo6010_dev
*solo_dev
)
230 unsigned long long errs
= 0;
231 u32 size
= SOLO_JPEG_EXT_ADDR(solo_dev
) + SOLO_JPEG_EXT_SIZE(solo_dev
);
234 printk(KERN_WARNING
"%s: Testing %u bytes of external ram\n",
235 SOLO6010_NAME
, size
);
237 for (i
= 0; i
< size
; i
+= TEST_CHUNK_SIZE
)
238 for (d
= 0; d
< 4; d
++)
239 errs
+= p2m_test(solo_dev
, d
, i
, TEST_CHUNK_SIZE
);
241 printk(KERN_WARNING
"%s: Found %llu errors during p2m test\n",
242 SOLO6010_NAME
, errs
);
247 #define run_p2m_test(__solo) do {} while (0)
250 void solo_p2m_isr(struct solo6010_dev
*solo_dev
, int id
)
252 struct solo_p2m_dev
*p2m_dev
= &solo_dev
->p2m_dev
[id
];
254 solo_reg_write(solo_dev
, SOLO_IRQ_STAT
, SOLO_IRQ_P2M(id
));
256 complete(&p2m_dev
->completion
);
259 void solo_p2m_error_isr(struct solo6010_dev
*solo_dev
, u32 status
)
261 struct solo_p2m_dev
*p2m_dev
;
264 if (!(status
& SOLO_PCI_ERR_P2M
))
267 for (i
= 0; i
< SOLO_NR_P2M
; i
++) {
268 p2m_dev
= &solo_dev
->p2m_dev
[i
];
270 solo_reg_write(solo_dev
, SOLO_P2M_CONTROL(i
), 0);
271 complete(&p2m_dev
->completion
);
275 void solo_p2m_exit(struct solo6010_dev
*solo_dev
)
279 for (i
= 0; i
< SOLO_NR_P2M
; i
++)
280 solo6010_irq_off(solo_dev
, SOLO_IRQ_P2M(i
));
283 int solo_p2m_init(struct solo6010_dev
*solo_dev
)
285 struct solo_p2m_dev
*p2m_dev
;
288 for (i
= 0; i
< SOLO_NR_P2M
; i
++) {
289 p2m_dev
= &solo_dev
->p2m_dev
[i
];
291 mutex_init(&p2m_dev
->mutex
);
292 init_completion(&p2m_dev
->completion
);
294 solo_reg_write(solo_dev
, SOLO_P2M_CONTROL(i
), 0);
295 solo_reg_write(solo_dev
, SOLO_P2M_CONFIG(i
),
296 SOLO_P2M_CSC_16BIT_565
|
297 SOLO_P2M_DMA_INTERVAL(3) |
298 SOLO_P2M_DESC_INTR_OPT
|
299 SOLO_P2M_PCI_MASTER_MODE
);
300 solo6010_irq_on(solo_dev
, SOLO_IRQ_P2M(i
));
303 run_p2m_test(solo_dev
);
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