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