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/*
* Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
* Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/kernel.h>
#include "solo6010.h"
// #define SOLO_TEST_P2M
int solo_p2m_dma(struct solo6010_dev *solo_dev, u8 id, int wr,
void *sys_addr, u32 ext_addr, u32 size)
{
dma_addr_t dma_addr;
int ret;
WARN_ON(!size);
WARN_ON(id >= SOLO_NR_P2M);
if (!size || id >= SOLO_NR_P2M)
return -EINVAL;
dma_addr = pci_map_single(solo_dev->pdev, sys_addr, size,
wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
ret = solo_p2m_dma_t(solo_dev, id, wr, dma_addr, ext_addr, size);
pci_unmap_single(solo_dev->pdev, dma_addr, size,
wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
return ret;
}
int solo_p2m_dma_t(struct solo6010_dev *solo_dev, u8 id, int wr,
dma_addr_t dma_addr, u32 ext_addr, u32 size)
{
struct solo_p2m_dev *p2m_dev;
unsigned int timeout = 0;
WARN_ON(!size);
WARN_ON(id >= SOLO_NR_P2M);
if (!size || id >= SOLO_NR_P2M)
return -EINVAL;
p2m_dev = &solo_dev->p2m_dev[id];
down(&p2m_dev->sem);
start_dma:
INIT_COMPLETION(p2m_dev->completion);
p2m_dev->error = 0;
solo_reg_write(solo_dev, SOLO_P2M_TAR_ADR(id), dma_addr);
solo_reg_write(solo_dev, SOLO_P2M_EXT_ADR(id), ext_addr);
solo_reg_write(solo_dev, SOLO_P2M_EXT_CFG(id),
SOLO_P2M_COPY_SIZE(size >> 2));
solo_reg_write(solo_dev, SOLO_P2M_CONTROL(id),
SOLO_P2M_BURST_SIZE(SOLO_P2M_BURST_256) |
(wr ? SOLO_P2M_WRITE : 0) | SOLO_P2M_TRANS_ON);
timeout = wait_for_completion_timeout(&p2m_dev->completion, HZ);
solo_reg_write(solo_dev, SOLO_P2M_CONTROL(id), 0);
/* XXX Really looks to me like we will get stuck here if a
* real PCI P2M error occurs */
if (p2m_dev->error)
goto start_dma;
up(&p2m_dev->sem);
return (timeout == 0) ? -EAGAIN : 0;
}
#ifdef SOLO_TEST_P2M
#define P2M_TEST_CHAR 0xbe
static unsigned long long p2m_test(struct solo6010_dev *solo_dev, u8 id,
u32 base, int size)
{
u8 *wr_buf;
u8 *rd_buf;
int i;
unsigned long long err_cnt = 0;
wr_buf = kmalloc(size, GFP_KERNEL);
if (!wr_buf) {
printk(SOLO6010_NAME ": Failed to malloc for p2m_test\n");
return size;
}
rd_buf = kmalloc(size, GFP_KERNEL);
if (!rd_buf) {
printk(SOLO6010_NAME ": Failed to malloc for p2m_test\n");
kfree(wr_buf);
return size;
}
memset(wr_buf, P2M_TEST_CHAR, size);
memset(rd_buf, P2M_TEST_CHAR + 1, size);
solo_p2m_dma(solo_dev, id, 1, wr_buf, base, size);
solo_p2m_dma(solo_dev, id, 0, rd_buf, base, size);
for (i = 0; i < size; i++)
if (wr_buf[i] != rd_buf[i])
err_cnt++;
kfree(wr_buf);
kfree(rd_buf);
return err_cnt;
}
#define TEST_CHUNK_SIZE (8 * 1024)
static void run_p2m_test(struct solo6010_dev *solo_dev)
{
unsigned long long errs = 0;
u32 size = SOLO_JPEG_EXT_ADDR(solo_dev) + SOLO_JPEG_EXT_SIZE(solo_dev);
int i, d;
printk(KERN_WARNING "%s: Testing %u bytes of external ram\n",
SOLO6010_NAME, size);
for (i = 0; i < size; i += TEST_CHUNK_SIZE)
for (d = 0; d < 4; d++)
errs += p2m_test(solo_dev, d, i, TEST_CHUNK_SIZE);
printk(KERN_WARNING "%s: Found %llu errors during p2m test\n",
SOLO6010_NAME, errs);
return;
}
#else
#define run_p2m_test(__solo) do{}while(0)
#endif
void solo_p2m_isr(struct solo6010_dev *solo_dev, int id)
{
solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_P2M(id));
complete(&solo_dev->p2m_dev[id].completion);
}
void solo_p2m_error_isr(struct solo6010_dev *solo_dev, u32 status)
{
struct solo_p2m_dev *p2m_dev;
int i;
if (!(status & SOLO_PCI_ERR_P2M))
return;
for (i = 0; i < SOLO_NR_P2M; i++) {
p2m_dev = &solo_dev->p2m_dev[i];
p2m_dev->error = 1;
solo_reg_write(solo_dev, SOLO_P2M_CONTROL(i), 0);
complete(&p2m_dev->completion);
}
}
void solo_p2m_exit(struct solo6010_dev *solo_dev)
{
int i;
for (i = 0; i < SOLO_NR_P2M; i++)
solo6010_irq_off(solo_dev, SOLO_IRQ_P2M(i));
}
int solo_p2m_init(struct solo6010_dev *solo_dev)
{
struct solo_p2m_dev *p2m_dev;
int i;
for (i = 0; i < SOLO_NR_P2M; i++) {
p2m_dev = &solo_dev->p2m_dev[i];
init_MUTEX(&p2m_dev->sem);
init_completion(&p2m_dev->completion);
solo_reg_write(solo_dev, SOLO_P2M_DES_ADR(i),
__pa(p2m_dev->desc));
solo_reg_write(solo_dev, SOLO_P2M_CONTROL(i), 0);
solo_reg_write(solo_dev, SOLO_P2M_CONFIG(i),
SOLO_P2M_CSC_16BIT_565 |
SOLO_P2M_DMA_INTERVAL(0) |
SOLO_P2M_PCI_MASTER_MODE);
solo6010_irq_on(solo_dev, SOLO_IRQ_P2M(i));
}
run_p2m_test(solo_dev);
return 0;
}
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