diff options
Diffstat (limited to 'drivers/staging/media/solo6x10/solo6x10-p2m.c')
| -rw-r--r-- | drivers/staging/media/solo6x10/solo6x10-p2m.c | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/drivers/staging/media/solo6x10/solo6x10-p2m.c b/drivers/staging/media/solo6x10/solo6x10-p2m.c deleted file mode 100644 index 7f2f2472655b..000000000000 --- a/drivers/staging/media/solo6x10/solo6x10-p2m.c +++ /dev/null @@ -1,333 +0,0 @@ -/* - * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com> - * - * Original author: - * Ben Collins <bcollins@ubuntu.com> - * - * Additional work by: - * John Brooks <john.brooks@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 <linux/module.h> -#include <linux/slab.h> - -#include "solo6x10.h" - -static int multi_p2m; -module_param(multi_p2m, uint, 0644); -MODULE_PARM_DESC(multi_p2m, - "Use multiple P2M DMA channels (default: no, 6010-only)"); - -static int desc_mode; -module_param(desc_mode, uint, 0644); -MODULE_PARM_DESC(desc_mode, - "Allow use of descriptor mode DMA (default: no, 6010-only)"); - -int solo_p2m_dma(struct solo_dev *solo_dev, int wr, - void *sys_addr, u32 ext_addr, u32 size, - int repeat, u32 ext_size) -{ - dma_addr_t dma_addr; - int ret; - - if (WARN_ON_ONCE((unsigned long)sys_addr & 0x03)) - return -EINVAL; - if (WARN_ON_ONCE(!size)) - return -EINVAL; - - dma_addr = pci_map_single(solo_dev->pdev, sys_addr, size, - wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - if (pci_dma_mapping_error(solo_dev->pdev, dma_addr)) - return -ENOMEM; - - ret = solo_p2m_dma_t(solo_dev, wr, dma_addr, ext_addr, size, - repeat, ext_size); - - pci_unmap_single(solo_dev->pdev, dma_addr, size, - wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - - return ret; -} - -/* Mutex must be held for p2m_id before calling this!! */ -int solo_p2m_dma_desc(struct solo_dev *solo_dev, - struct solo_p2m_desc *desc, dma_addr_t desc_dma, - int desc_cnt) -{ - struct solo_p2m_dev *p2m_dev; - unsigned int timeout; - unsigned int config = 0; - int ret = 0; - int p2m_id = 0; - - /* Get next ID. According to Softlogic, 6110 has problems on !=0 P2M */ - if (solo_dev->type != SOLO_DEV_6110 && multi_p2m) { - p2m_id = atomic_inc_return(&solo_dev->p2m_count) % SOLO_NR_P2M; - if (p2m_id < 0) - p2m_id = -p2m_id; - } - - p2m_dev = &solo_dev->p2m_dev[p2m_id]; - - if (mutex_lock_interruptible(&p2m_dev->mutex)) - return -EINTR; - - reinit_completion(&p2m_dev->completion); - p2m_dev->error = 0; - - if (desc_cnt > 1 && solo_dev->type != SOLO_DEV_6110 && desc_mode) { - /* For 6010 with more than one desc, we can do a one-shot */ - p2m_dev->desc_count = p2m_dev->desc_idx = 0; - config = solo_reg_read(solo_dev, SOLO_P2M_CONFIG(p2m_id)); - - solo_reg_write(solo_dev, SOLO_P2M_DES_ADR(p2m_id), desc_dma); - solo_reg_write(solo_dev, SOLO_P2M_DESC_ID(p2m_id), desc_cnt); - solo_reg_write(solo_dev, SOLO_P2M_CONFIG(p2m_id), config | - SOLO_P2M_DESC_MODE); - } else { - /* For single descriptors and 6110, we need to run each desc */ - p2m_dev->desc_count = desc_cnt; - p2m_dev->desc_idx = 1; - p2m_dev->descs = desc; - - solo_reg_write(solo_dev, SOLO_P2M_TAR_ADR(p2m_id), - desc[1].dma_addr); - solo_reg_write(solo_dev, SOLO_P2M_EXT_ADR(p2m_id), - desc[1].ext_addr); - solo_reg_write(solo_dev, SOLO_P2M_EXT_CFG(p2m_id), - desc[1].cfg); - solo_reg_write(solo_dev, SOLO_P2M_CONTROL(p2m_id), - desc[1].ctrl); - } - - timeout = wait_for_completion_timeout(&p2m_dev->completion, - solo_dev->p2m_jiffies); - - if (WARN_ON_ONCE(p2m_dev->error)) - ret = -EIO; - else if (timeout == 0) { - solo_dev->p2m_timeouts++; - ret = -EAGAIN; - } - - solo_reg_write(solo_dev, SOLO_P2M_CONTROL(p2m_id), 0); - - /* Don't write here for the no_desc_mode case, because config is 0. - * We can't test no_desc_mode again, it might race. */ - if (desc_cnt > 1 && solo_dev->type != SOLO_DEV_6110 && config) - solo_reg_write(solo_dev, SOLO_P2M_CONFIG(p2m_id), config); - - mutex_unlock(&p2m_dev->mutex); - - return ret; -} - -void solo_p2m_fill_desc(struct solo_p2m_desc *desc, int wr, - dma_addr_t dma_addr, u32 ext_addr, u32 size, - int repeat, u32 ext_size) -{ - WARN_ON_ONCE(dma_addr & 0x03); - WARN_ON_ONCE(!size); - - desc->cfg = SOLO_P2M_COPY_SIZE(size >> 2); - desc->ctrl = SOLO_P2M_BURST_SIZE(SOLO_P2M_BURST_256) | - (wr ? SOLO_P2M_WRITE : 0) | SOLO_P2M_TRANS_ON; - - if (repeat) { - desc->cfg |= SOLO_P2M_EXT_INC(ext_size >> 2); - desc->ctrl |= SOLO_P2M_PCI_INC(size >> 2) | - SOLO_P2M_REPEAT(repeat); - } - - desc->dma_addr = dma_addr; - desc->ext_addr = ext_addr; -} - -int solo_p2m_dma_t(struct solo_dev *solo_dev, int wr, - dma_addr_t dma_addr, u32 ext_addr, u32 size, - int repeat, u32 ext_size) -{ - struct solo_p2m_desc desc[2]; - - solo_p2m_fill_desc(&desc[1], wr, dma_addr, ext_addr, size, repeat, - ext_size); - - /* No need for desc_dma since we know it is a single-shot */ - return solo_p2m_dma_desc(solo_dev, desc, 0, 1); -} - -void solo_p2m_isr(struct solo_dev *solo_dev, int id) -{ - struct solo_p2m_dev *p2m_dev = &solo_dev->p2m_dev[id]; - struct solo_p2m_desc *desc; - - if (p2m_dev->desc_count <= p2m_dev->desc_idx) { - complete(&p2m_dev->completion); - return; - } - - /* Setup next descriptor */ - p2m_dev->desc_idx++; - desc = &p2m_dev->descs[p2m_dev->desc_idx]; - - solo_reg_write(solo_dev, SOLO_P2M_CONTROL(id), 0); - solo_reg_write(solo_dev, SOLO_P2M_TAR_ADR(id), desc->dma_addr); - solo_reg_write(solo_dev, SOLO_P2M_EXT_ADR(id), desc->ext_addr); - solo_reg_write(solo_dev, SOLO_P2M_EXT_CFG(id), desc->cfg); - solo_reg_write(solo_dev, SOLO_P2M_CONTROL(id), desc->ctrl); -} - -void solo_p2m_error_isr(struct solo_dev *solo_dev) -{ - unsigned int err = solo_reg_read(solo_dev, SOLO_PCI_ERR); - struct solo_p2m_dev *p2m_dev; - int i; - - if (!(err & (SOLO_PCI_ERR_P2M | SOLO_PCI_ERR_P2M_DESC))) - 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 solo_dev *solo_dev) -{ - int i; - - for (i = 0; i < SOLO_NR_P2M; i++) - solo_irq_off(solo_dev, SOLO_IRQ_P2M(i)); -} - -static int solo_p2m_test(struct solo_dev *solo_dev, int base, int size) -{ - u32 *wr_buf; - u32 *rd_buf; - int i; - int ret = -EIO; - int order = get_order(size); - - wr_buf = (u32 *)__get_free_pages(GFP_KERNEL, order); - if (wr_buf == NULL) - return -1; - - rd_buf = (u32 *)__get_free_pages(GFP_KERNEL, order); - if (rd_buf == NULL) { - free_pages((unsigned long)wr_buf, order); - return -1; - } - - for (i = 0; i < (size >> 3); i++) - *(wr_buf + i) = (i << 16) | (i + 1); - - for (i = (size >> 3); i < (size >> 2); i++) - *(wr_buf + i) = ~((i << 16) | (i + 1)); - - memset(rd_buf, 0x55, size); - - if (solo_p2m_dma(solo_dev, 1, wr_buf, base, size, 0, 0)) - goto test_fail; - - if (solo_p2m_dma(solo_dev, 0, rd_buf, base, size, 0, 0)) - goto test_fail; - - for (i = 0; i < (size >> 2); i++) { - if (*(wr_buf + i) != *(rd_buf + i)) - goto test_fail; - } - - ret = 0; - -test_fail: - free_pages((unsigned long)wr_buf, order); - free_pages((unsigned long)rd_buf, order); - - return ret; -} - -int solo_p2m_init(struct solo_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]; - - mutex_init(&p2m_dev->mutex); - init_completion(&p2m_dev->completion); - - 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_DESC_INTR_OPT | - SOLO_P2M_DMA_INTERVAL(0) | - SOLO_P2M_PCI_MASTER_MODE); - solo_irq_on(solo_dev, SOLO_IRQ_P2M(i)); - } - - /* Find correct SDRAM size */ - for (solo_dev->sdram_size = 0, i = 2; i >= 0; i--) { - solo_reg_write(solo_dev, SOLO_DMA_CTRL, - SOLO_DMA_CTRL_REFRESH_CYCLE(1) | - SOLO_DMA_CTRL_SDRAM_SIZE(i) | - SOLO_DMA_CTRL_SDRAM_CLK_INVERT | - SOLO_DMA_CTRL_READ_CLK_SELECT | - SOLO_DMA_CTRL_LATENCY(1)); - - solo_reg_write(solo_dev, SOLO_SYS_CFG, solo_dev->sys_config | - SOLO_SYS_CFG_RESET); - solo_reg_write(solo_dev, SOLO_SYS_CFG, solo_dev->sys_config); - - switch (i) { - case 2: - if (solo_p2m_test(solo_dev, 0x07ff0000, 0x00010000) || - solo_p2m_test(solo_dev, 0x05ff0000, 0x00010000)) - continue; - break; - - case 1: - if (solo_p2m_test(solo_dev, 0x03ff0000, 0x00010000)) - continue; - break; - - default: - if (solo_p2m_test(solo_dev, 0x01ff0000, 0x00010000)) - continue; - } - - solo_dev->sdram_size = (32 << 20) << i; - break; - } - - if (!solo_dev->sdram_size) { - dev_err(&solo_dev->pdev->dev, "Error detecting SDRAM size\n"); - return -EIO; - } - - if (SOLO_SDRAM_END(solo_dev) > solo_dev->sdram_size) { - dev_err(&solo_dev->pdev->dev, - "SDRAM is not large enough (%u < %u)\n", - solo_dev->sdram_size, SOLO_SDRAM_END(solo_dev)); - return -EIO; - } - - return 0; -} |