diff options
Diffstat (limited to 'target/linux/amazon-2.6/files/arch/mips/amazon/dma-core.c')
| -rw-r--r-- | target/linux/amazon-2.6/files/arch/mips/amazon/dma-core.c | 1455 |
1 files changed, 0 insertions, 1455 deletions
diff --git a/target/linux/amazon-2.6/files/arch/mips/amazon/dma-core.c b/target/linux/amazon-2.6/files/arch/mips/amazon/dma-core.c deleted file mode 100644 index 242bc77af2..0000000000 --- a/target/linux/amazon-2.6/files/arch/mips/amazon/dma-core.c +++ /dev/null @@ -1,1455 +0,0 @@ -/* - * 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. - */ -//----------------------------------------------------------------------- -/* - * Description: - * Driver for Infineon Amazon DMA - */ -//----------------------------------------------------------------------- -/* Author: Wu Qi Ming[Qi-Ming.Wu@infineon.com] - * Created: 7-April-2004 - */ -//----------------------------------------------------------------------- -/* History - * Last changed on: 4-May-2004 - * Last changed by: <peng.liu@infineon.com> - * Reason: debug - */ -//----------------------------------------------------------------------- -/* Last changed on: 03-Dec-2004 - * Last changed by: peng.liu@infineon.com - * Reason: recover from TPE bug - */ - -//000004:fchang 2005/6/2 Modified by Linpeng as described below -//----------------------------------------------------------------------- -/* Last changed on: 28-Jan-2004 - * Last changed by: peng.liu@infineon.com - * Reason: - * - handle "out of memory" bug - */ -//000003:tc.chen 2005/06/16 fix memory leak when Tx buffer full (heaving traffic). -//507261:tc.chen 2005/07/26 re-organize code address map to improve performance. - -#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS) -#define MODVERSIONS -#endif - -#if defined(MODVERSIONS) && !defined(__GENKSYMS__) -#include <linux/modversions.h> -#endif - -#ifndef EXPORT_SYMTAB -#define EXPORT_SYMTAB /* need this one 'cause we export symbols */ -#endif - -#undef DMA_NO_POLLING - -/* no TX interrupt handling */ -#define NO_TX_INT -/* need for DMA workaround */ -#undef AMAZON_DMA_TPE_AAL5_RECOVERY - -#ifdef AMAZON_DMA_TPE_AAL5_RECOVERY -#define MAX_SYNC_FAILS 1000000 // 000004:fchang -unsigned int dma_sync_fails = 0; -unsigned int total_dma_tpe_reset = 0; -int (*tpe_reset) (void); -int (*tpe_start) (void); -int (*tpe_inject) (void); -#endif // AMAZON_DMA_TPE_AAL5_RECOVERY - - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/fs.h> -#include <linux/errno.h> -#include <linux/proc_fs.h> -#include <linux/stat.h> -#include <linux/mm.h> -#include <linux/tty.h> -#include <linux/selection.h> -#include <linux/kmod.h> -#include <linux/vmalloc.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <asm/uaccess.h> -#include <linux/errno.h> -#include <asm/io.h> - -#include <asm/amazon/amazon.h> -#include <asm/amazon/irq.h> -#include <asm/amazon/amazon_dma.h> -#include "dma-core.h" - -#define AMAZON_DMA_EMSG(fmt, args...) printk( KERN_ERR "%s: " fmt,__FUNCTION__, ## args) - -static irqreturn_t dma_interrupt(int irq, void *dev_id); -extern void mask_and_ack_amazon_irq(unsigned int irq_nr); - -/***************************************** global data *******************************************/ -u64 *g_desc_list; -dev_list *g_current_dev = NULL; -dev_list *g_head_dev = NULL; -dev_list *g_tail_dev = NULL; -channel_info g_log_chan[CHAN_TOTAL_NUM + 1]; -struct proc_dir_entry *g_amazon_dma_dir; -static u8 rx_chan_list_len = 0; -static u8 tx_chan_list_len = 0; -static int rx_chan_list[RX_CHAN_NUM + 1]; -static int tx_chan_list[TX_CHAN_NUM + 1]; -static u32 comb_isr_mask[CHAN_TOTAL_NUM]; - -static inline int is_rx_chan(int chan_no) -/*judge if this is an rx channel*/ -{ - int result = 0; - if (chan_no < RX_CHAN_NUM) - result = 1; - return result; -} - -/* Ugly, Channel ON register is badly mapped to channel no. */ -static u8 ch_on_mapping[CHAN_TOTAL_NUM] = - { 0, 1, 2, 3, 6, 7, 10, 4, 5, 8, 9, 11 }; - -/* Brief: check wether the chan_no is legal - * Parameter: chan_no: logical channel number - * Return: 0 if is not valid - * 1 if is valid - */ -static inline int is_valid_dma_ch(int chan_no) -{ - return ((chan_no >= 0) && (chan_no < CHAN_TOTAL_NUM)); -} - -/* Brief: check whether a channel is open through Channel ON register - * Parameter: chan_no: logical channel number - * Return: 1 channel is open - * 0 not yet - * EINVAL: invalid parameter - */ -static inline int is_channel_open(int chan_no) -{ - return (AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) & - (1 << ch_on_mapping[chan_no])); -} - -/* Brief: add a list entry - * Description: - * always add to the tail and no redundancy allowed. (i.e. entries are unique) - * 0 : entry deleted - * <0 : not deleted (due to not unique) - */ -static inline int _add_list_entry(int *list, int size_of_list, int entry) -{ - int i; - for (i = 0; i < size_of_list; i++) { - if (list[i] == entry) - break; - if (list[i] < 0) { - list[i] = entry; - return 0; - } - } - return -1; -} - -/* Brief: delete a list entry - * Description: - * find the entry and remove it. shift all entries behind it one step forward if necessary\ - * Return: - * 0 : entry deleted - * <0 : not deleted (due to not found?) - */ -static inline int _delete_list_entry(int *list, int size_of_list, - int entry) -{ - int i, j; - for (i = 0; i < size_of_list; i++) { - if (list[i] == entry) { - for (j = i; j < size_of_list; j++) { - list[j] = list[j + 1]; - if (list[j + 1] < 0) { - break; - } - } - return 0; - } - } - return -1; -} - -/* Brief: enable a channel through Channel ON register - * Parameter: chan_no: logical channel number - * Description: - * Please don't open a channel without a valid descriptor (hardware pitfall) - */ -static inline void open_channel(int chan_no) -{ - AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) |= (1 << ch_on_mapping[chan_no]); - if (is_rx_chan(chan_no)) { - if (_add_list_entry(rx_chan_list, RX_CHAN_NUM, chan_no) == 0) { - rx_chan_list_len++; - } else { - AMAZON_DMA_DMSG("cannot add chan %d to open list\n", chan_no); - } - } else { - if (_add_list_entry(tx_chan_list, TX_CHAN_NUM, chan_no) == 0) { - tx_chan_list_len++; - } else { - AMAZON_DMA_DMSG("cannot add chan %d to open list\n", chan_no); - } - } -} - -/* Brief: disable a channel through Channel ON register - * Parameter: chan_no: logical channel number - */ - -static inline void close_channel(int chan_no) -{ - AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) &= ~(1 << ch_on_mapping[chan_no]); - if (is_rx_chan(chan_no)) { - if (_delete_list_entry(rx_chan_list, RX_CHAN_NUM, chan_no) == 0) { - rx_chan_list_len--; - } else { - AMAZON_DMA_DMSG("cannot remove chan %d from open list \n", - chan_no); - } - } else { - if (_delete_list_entry(tx_chan_list, TX_CHAN_NUM, chan_no) == 0) { - tx_chan_list_len--; - } else { - AMAZON_DMA_DMSG("cannot remove chan %d from open list \n", - chan_no); - } - } -} - -/* Brief: clear RX interrupt - */ -inline void rx_chan_clear_isr(int chan_no) -{ -#ifdef DMA_NO_POLLING - AMAZON_DMA_REG32(AMAZON_DMA_CH0_ISR + chan_no * AMAZON_DMA_CH_STEP) = - (AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - chan_no * - AMAZON_DMA_CH_STEP) & (DMA_ISR_CPT | DMA_ISR_EOP | DMA_ISR_CMDCPT - | DMA_ISR_DURR)); -#else - AMAZON_DMA_REG32(AMAZON_DMA_CH0_ISR + chan_no * AMAZON_DMA_CH_STEP) = - (AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - chan_no * - AMAZON_DMA_CH_STEP) & (DMA_ISR_CPT | DMA_ISR_EOP | - DMA_ISR_CMDCPT)); -#endif -} - - -/* Brief: hacking function, this will reset all descriptors back to DMA - */ -static void dma_reset_all_descriptors(int chan_no) -{ - volatile struct rx_desc *rx_desc_p = NULL; - int i; - rx_desc_p = - (struct rx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base; - for (i = 0; i < g_log_chan[chan_no].desc_len; i++) { - rx_desc_p->status.word &= - (~(DMA_DESC_SOP_SET | DMA_DESC_EOP_SET | DMA_DESC_CPT_SET)); - rx_desc_p->status.word |= - (DMA_DESC_OWN_DMA | g_log_chan[chan_no].packet_size); - rx_desc_p++; - } -} - -#ifdef AMAZON_DMA_TPE_AAL5_RECOVERY -/* Brief: Reset DMA descriptors - */ -static void amazon_dma_reset_tpe_rx(int chan_no) -{ - struct tx_desc *tx_desc_p = NULL; - int j, i = 0; - - // wait until all TX channels stop transmitting - for (j = 9; j <= 10; j++) { - tx_desc_p = - (struct tx_desc *) g_desc_list + - g_log_chan[j].offset_from_base; - for (i = 0; i < g_log_chan[j].desc_len; i++) { - while ((tx_desc_p->status.field.OWN != CPU_OWN)) { - AMAZON_DMA_DMSG("DMA TX in progress\n"); // 000004:fchang - udelay(100); - } - tx_desc_p++; - } - } - - if (tpe_reset) { - total_dma_tpe_reset++; - AMAZON_DMA_DMSG - ("\n===============resetting TPE========================== \n"); - if ((*tpe_reset) ()) { - panic("cannot reset TPE engien\n"); // 000004:fchang - } - } else { - panic("no tpe_reset function\n"); // 000004:fchang - return; - } - dma_reset_all_descriptors(chan_no); - rx_chan_clear_isr(chan_no); - mb(); - - // send EoP - if (tpe_inject) { - if ((*tpe_inject) ()) { - panic("cannot inject a cell\n"); // 000004:fchang - } - } else { - AMAZON_DMA_EMSG("no tpe_inject function\n"); - return; - } - mb(); - while (1) { - if (AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - chan_no * AMAZON_DMA_CH_STEP) & (DMA_ISR_CPT)) { - rx_chan_clear_isr(chan_no); - mb(); - dma_reset_all_descriptors(chan_no); - if (g_log_chan[chan_no].current_desc == - (g_log_chan[chan_no].desc_len - 1)) { - g_log_chan[chan_no].current_desc = 0; - } else { - g_log_chan[chan_no].current_desc++; - } - break; - } - mdelay(1); - } - mb(); -#if 0 - AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) &= ~(1 << ch_on_mapping[chan_no]); - while (AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) & - (1 << ch_on_mapping[chan_no])) { - printk("TPE channel still on\n"); - mdelay(1); - } - - // AMAZON_DMA_REG32(AMAZON_DMA_CH_RST) = (1<<chan_no); - mb(); - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK + chan_no * AMAZON_DMA_CH_STEP) = - 0x32; - mb(); - rx_chan_clear_isr(chan_no); - dma_reset_all_descriptors(chan_no); - mb(); - AMAZON_DMA_REG32(AMAZON_DMA_CH_ON) |= (1 << ch_on_mapping[chan_no]); - // g_log_chan[chan_no].current_desc=0; - mb(); - mdelay(1); -#endif - if (tpe_start) { - (*tpe_start) (); - } else { - AMAZON_DMA_EMSG("cannot restart TPE engien\n"); - } -} -#endif // AMAZON_DMA_TPE_AAL5_RECOVERY - - -/* Brief: RX channel interrupt handler - * Parameter: RX channel no - * Description: the interrupt handler for each RX channel - * 1. check descriptor, clear ISR if no incoming packet - * 2. inform upper layer to receive packet (and update descriptors) - */ -inline void rx_chan_intr_handler(int chan_no) -{ - volatile struct rx_desc *rx_desc_p = NULL; - - /* fetch the current descriptor */ - rx_desc_p = - (struct rx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base + - g_log_chan[chan_no].current_desc; - - g_log_chan[chan_no].dma_dev->current_rx_chan = - chan_no - g_log_chan[chan_no].dma_dev->logic_rx_chan_base; - - // workaround for DMA pitfall: complete bit set happends before the - // other two bits (own,eop) are ready - if ((rx_desc_p->status.field.EoP != 1) - || (rx_desc_p->status.field.OWN != CPU_OWN) - || (rx_desc_p->status.field.data_length == - g_log_chan[chan_no].packet_size)) { -#ifdef AMAZON_DMA_TPE_AAL5_RECOVERY - if (chan_no == 4 || chan_no == 5) { - dma_sync_fails++; - if (dma_sync_fails > MAX_SYNC_FAILS) { - // detect bug - rx_desc_p0 = - (struct rx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base; - rx_desc_p1 = - (struct rx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base + 1; - if ((rx_desc_p0->status.field.OWN == CPU_OWN - && rx_desc_p0->status.field.EoP != 1) - && (rx_desc_p1->status.field.OWN == CPU_OWN - && rx_desc_p1->status.field.EoP != 1)) { - amazon_dma_reset_tpe_rx(chan_no); - dma_sync_fails = 0; - return; - } - dma_sync_fails = 0; - AMAZON_DMA_DMSG("too many times ch:%d\n", chan_no); // 000004:fchang - return; - } - udelay(10); // 000004:fchang - } -#endif // //AMAZON_DMA_TPE_AAL5_RECOVERY - return; - } - - /* inform the upper layer to receive the packet */ - g_log_chan[chan_no].intr_handler(g_log_chan[chan_no].dma_dev, RCV_INT); - /* check the next descriptor, if still contains the incoming packet, - then do not clear the interrupt status */ - rx_desc_p = - (struct rx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base + - g_log_chan[chan_no].current_desc; - if (! - ((rx_desc_p->status.field.OWN == CPU_OWN) - && (rx_desc_p->status.field.C == 1))) { - rx_chan_clear_isr(chan_no); - } -} - - -/* Brief: TX channel interrupt handler - * Parameter: TX channel no - * Description: the interrupt handler for each TX channel - * 1. check all the descripters,if any of them had transmitted a packet, then free buffer - * because we cannot garantee the which one has already transmitted out, we have to go through all the descriptors here - * 2. clear the interrupt status bit - */ -inline void tx_chan_intr_handler(int chan_no) -{ - struct tx_desc *tx_desc_p = NULL; - int i = 0; - - tx_desc_p = - (struct tx_desc *) g_desc_list + - g_log_chan[chan_no].offset_from_base; - - for (i = 0; i < g_log_chan[chan_no].desc_len; i++) { - if ((tx_desc_p->status.field.OWN == CPU_OWN) - && (tx_desc_p->status.field.C == 1)) { - /* if already transmitted, then free the buffer */ - g_log_chan[chan_no]. - buffer_free((u8 *) __va(tx_desc_p->Data_Pointer), - g_log_chan[chan_no].opt[i]); - tx_desc_p->status.field.C = 0; - /* inform the upper layer about the completion of the - transmitted packet, the upper layer may want to free the - packet */ - g_log_chan[chan_no].intr_handler(g_log_chan[chan_no].dma_dev, - TRANSMIT_CPT_INT); - } - tx_desc_p++; - } - - /* after all these operations, clear the interrupt status bit */ - AMAZON_DMA_REG32(AMAZON_DMA_CH0_ISR + chan_no * AMAZON_DMA_CH_STEP) = - (AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - chan_no * - AMAZON_DMA_CH_STEP) & (DMA_ISR_CPT | DMA_ISR_EOP | - DMA_ISR_CMDCPT)); -} - -/* Brief: DMA interrupt handler - */ -static irqreturn_t dma_interrupt(int irq, void *dev_id) -{ - int i = 0; - int chan_no; - u32 isr = 0; -#ifdef NO_TX_INT // 000004:fchang - static int cnt = 0; // 000004:fchang -#endif // 000004:fchang - while ((isr = - AMAZON_DMA_REG32(AMAZON_DMA_COMB_ISR)) & (COMB_ISR_RX_MASK | - COMB_ISR_TX_MASK)) { - if (isr & COMB_ISR_RX_MASK) { - // RX Channels: start WFQ algorithm - chan_no = CHAN_TOTAL_NUM; - for (i = 0; i < RX_CHAN_NUM; i++) { - if ((isr & (comb_isr_mask[i])) - && (g_log_chan[i].weight > 0)) { - if (g_log_chan[chan_no].weight < g_log_chan[i].weight) { - chan_no = i; - } - } - } - if (chan_no < CHAN_TOTAL_NUM) { - rx_chan_intr_handler(chan_no); - } else { - for (i = 0; i < RX_CHAN_NUM; i++) { - g_log_chan[i].weight = g_log_chan[i].default_weight; - } - } - } -#ifdef NO_TX_INT - cnt++; - if (cnt == 10) { - cnt = 0; - for (i = 0; i < tx_chan_list_len; i++) { - if (AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - tx_chan_list[i] * - AMAZON_DMA_CH_STEP) & (DMA_ISR_CPT | DMA_ISR_EOP)) { - tx_chan_intr_handler(tx_chan_list[i]); - } - } - } -#else - if (isr & COMB_ISR_TX_MASK) { - // TX channels: RR - for (i = 0; i < tx_chan_list_len; i++) { - if (isr & (comb_isr_mask[tx_chan_list[i]])) { - tx_chan_intr_handler(tx_chan_list[i]); - } - } - } -#endif - } // while - return IRQ_HANDLED; -} - - -/* Brief: read a packet from DMA RX channel - * Parameter: - * Return: packet length - * Description: - * This is called back in a context of DMA interrupt - * 1. prepare new descriptor - * 2. read data - * 3. update WFQ weight - */ -//507261:tc.chen int dma_device_read(struct dma_device_info* dma_dev, u8** dataptr, void** opt) -int asmlinkage dma_device_read(struct dma_device_info *dma_dev, - u8 ** dataptr, void **opt) -{ - u8 *buf; - int len; - int chan_no = 0; - int byte_offset = 0; - - struct rx_desc *rx_desc_p; - void *p = NULL; - int current_desc; - - chan_no = dma_dev->logic_rx_chan_base + dma_dev->current_rx_chan; - current_desc = g_log_chan[chan_no].current_desc; - rx_desc_p = - (struct rx_desc *) (g_desc_list + - g_log_chan[chan_no].offset_from_base + - current_desc); - buf = (u8 *) __va(rx_desc_p->Data_Pointer); /* extract the virtual - address of the data - pointer */ - len = rx_desc_p->status.field.data_length; /* extract the data length */ -#ifndef CONFIG_MIPS_UNCACHED - dma_cache_inv((unsigned long) buf, len); -#endif // CONFIG_MIPS_UNCACHED - *(u32 *) dataptr = (u32) buf; - if (opt) { - *(int *) opt = (int) g_log_chan[chan_no].opt[current_desc]; /* read - out - the - opt - information */ - } - - buf = - (u8 *) g_log_chan[chan_no].buffer_alloc(g_log_chan[chan_no]. - packet_size, &byte_offset, - &p); - // should check null!!!! - if (buf == NULL || p == NULL) { - *(u32 *) dataptr = 0; - *(int *) opt = 0; - len = 0; - } else { - g_log_chan[chan_no].opt[current_desc] = p; - /* reduce the weight for WFQ algorithm */ - g_log_chan[chan_no].weight -= len; - rx_desc_p->Data_Pointer = (u32) CPHYSADDR((u32) buf); - } - if (current_desc == g_log_chan[chan_no].desc_len - 1) { - current_desc = 0; - } else { - current_desc++; - } - g_log_chan[chan_no].current_desc = current_desc; - - rx_desc_p->status.word = DMA_DESC_OWN_DMA - | (byte_offset << DMA_DESC_BYTEOFF_SHIFT) - | g_log_chan[chan_no].packet_size; - return len; -} - -/* Brief: write a packet through DMA RX channel to peripheral - * Parameter: - * Return: packet length - * Description: - * - */ -u64 dma_tx_drop = 0; -//507261:tc.chen int dma_device_write(struct dma_device_info* dma_dev, u8* dataptr, int len,void* opt) -int asmlinkage dma_device_write(struct dma_device_info *dma_dev, - u8 * dataptr, int len, void *opt) -{ - int chan_no = 0; - struct tx_desc *tx_desc_p; - - int byte_offset = 0; - int current_desc; - static int cnt = 0; // 000004:fchang - - unsigned long flag; - local_irq_save(flag); - - chan_no = dma_dev->logic_tx_chan_base + dma_dev->current_tx_chan; - current_desc = g_log_chan[chan_no].current_desc; - tx_desc_p = - (struct tx_desc *) (g_desc_list + - g_log_chan[chan_no].offset_from_base + - current_desc); - // 000003:tc.chen if(tx_desc_p->status.field.OWN==DMA_OWN){ - if (tx_desc_p->status.field.OWN == DMA_OWN || tx_desc_p->status.field.C == 1) { // 000003:tc.chen - AMAZON_DMA_DMSG("no TX desc for CPU, drop packet\n"); - dma_tx_drop++; - g_log_chan[chan_no].intr_handler(dma_dev, TX_BUF_FULL_INT); - local_irq_restore(flag); - return 0; - } - g_log_chan[chan_no].opt[current_desc] = opt; - - /* byte offset----to adjust the starting address of the data buffer, - should be multiple of the burst length. */ - byte_offset = - ((u32) CPHYSADDR((u32) dataptr)) % (g_log_chan[chan_no].burst_len * - 4); -#ifndef CONFIG_MIPS_UNCACHED - dma_cache_wback((unsigned long) dataptr, len); - wmb(); -#endif // CONFIG_MIPS_UNCACHED - - tx_desc_p->Data_Pointer = (u32) CPHYSADDR((u32) dataptr) - byte_offset; - wmb(); - tx_desc_p->status.word = DMA_DESC_OWN_DMA - | DMA_DESC_SOP_SET - | DMA_DESC_EOP_SET | (byte_offset << DMA_DESC_BYTEOFF_SHIFT) - | len; - wmb(); - if (is_channel_open(chan_no) == 0) { - // turn on if necessary - open_channel(chan_no); - } -#ifdef DMA_NO_POLLING - if ((AMAZON_DMA_REG32 - (AMAZON_DMA_CH0_ISR + - chan_no * AMAZON_DMA_CH_STEP) & (DMA_ISR_DURR | DMA_ISR_CPT)) == - (DMA_ISR_DURR)) { - // clear DURR if (CPT is AND set and DURR is set) - AMAZON_DMA_REG32(AMAZON_DMA_CH0_ISR + - chan_no * AMAZON_DMA_CH_STEP) = DMA_ISR_DURR; - } -#endif - - if (current_desc == (g_log_chan[chan_no].desc_len - 1)) { - current_desc = 0; - } else { - current_desc++; - } - - - g_log_chan[chan_no].current_desc = current_desc; - tx_desc_p = - (struct tx_desc *) (g_desc_list + - g_log_chan[chan_no].offset_from_base + - current_desc); - // 000003:tc.chen if(tx_desc_p->status.field.OWN==DMA_OWN){ - if (tx_desc_p->status.field.OWN == DMA_OWN || tx_desc_p->status.field.C == 1) { // 000003:tc.chen - g_log_chan[chan_no].intr_handler(dma_dev, TX_BUF_FULL_INT); - } -#ifdef NO_TX_INT -//000004:fchang Start - cnt++; - if (cnt == 5) { - cnt = 0; - tx_chan_intr_handler(chan_no); - } -//000004:fchang End -#endif - local_irq_restore(flag); // 000004:fchang - return len; -} - - - -int desc_list_proc_read(char *buf, char **start, off_t offset, - int count, int *eof, void *data) -{ - int i; - u32 *p = (u32 *) g_desc_list; - int len = 0; - len += sprintf(buf + len, "descriptor list:\n"); - for (i = 0; i < 120; i++) { - len += sprintf(buf + len, "%d\n", i); - len += sprintf(buf + len, "%08x\n", *(p + i * 2 + 1)); - len += sprintf(buf + len, "%08x\n", *(p + i * 2)); - - } - - return len; - -} - -int channel_weight_proc_read(char *buf, char **start, off_t offset, - int count, int *eof, void *data) -{ - - // int i=0; - int len = 0; - len += sprintf(buf + len, "Qos dma channel weight list\n"); - len += - sprintf(buf + len, - "channel_num default_weight current_weight device Tx/Rx\n"); - len += - sprintf(buf + len, - " 0 %08x %08x Switch Rx0\n", - g_log_chan[0].default_weight, g_log_chan[0].weight); - len += - sprintf(buf + len, - " 1 %08x %08x Switch Rx1\n", - g_log_chan[1].default_weight, g_log_chan[1].weight); - len += - sprintf(buf + len, - " 2 %08x %08x Switch Rx2\n", - g_log_chan[2].default_weight, g_log_chan[2].weight); - len += - sprintf(buf + len, - " 3 %08x %08x Switch Rx3\n", - g_log_chan[3].default_weight, g_log_chan[3].weight); - len += - sprintf(buf + len, - " 4 %08x %08x Switch Tx0\n", - g_log_chan[4].default_weight, g_log_chan[4].weight); - len += - sprintf(buf + len, - " 5 %08x %08x Switch Tx1\n", - g_log_chan[5].default_weight, g_log_chan[5].weight); - /* - len+=sprintf(buf+len," 6 %08x %08x TPE - Rx0\n",g_log_chan[6].default_weight, g_log_chan[6].weight); - len+=sprintf(buf+len," 7 %08x %08x TPE - Rx0\n",g_log_chan[7].default_weight, g_log_chan[7].weight); - len+=sprintf(buf+len," 8 %08x %08x TPE - Tx0\n",g_log_chan[8].default_weight, g_log_chan[8].weight); - len+=sprintf(buf+len," 9 %08x %08x TPE - Rx0\n",g_log_chan[9].default_weight, g_log_chan[9].weight); - len+=sprintf(buf+len," 10 %08x %08x DPLUS - Rx0\n",g_log_chan[10].default_weight, g_log_chan[10].weight); - len+=sprintf(buf+len," 11 %08x %08x DPLUS - Rx0\n",g_log_chan[11].default_weight, g_log_chan[11].weight); */ - return len; -} - -int dma_register_proc_read(char *buf, char **start, off_t offset, - int count, int *eof, void *data) -{ - dev_list *temp_dev; - int len = 0;; - - len += sprintf(buf + len, "amazon dma driver\n"); - len += sprintf(buf + len, "version 1.0\n"); - len += sprintf(buf + len, "devices registered:\n"); - for (temp_dev = g_head_dev; temp_dev; temp_dev = temp_dev->next) { - len += sprintf(buf + len, "%s ", temp_dev->dev->device_name); - } - len += sprintf(buf + len, "\n"); - len += sprintf(buf + len, "CH_ON=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH_ON)); - len += sprintf(buf + len, "CH_RST=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH_RST)); - len += sprintf(buf + len, "CH0_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH0_ISR)); - len += sprintf(buf + len, "CH1_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH1_ISR)); - len += sprintf(buf + len, "CH2_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH2_ISR)); - len += sprintf(buf + len, "CH3_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH3_ISR)); - len += sprintf(buf + len, "CH4_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH4_ISR)); - len += sprintf(buf + len, "CH5_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH5_ISR)); - len += sprintf(buf + len, "CH6_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH6_ISR)); - len += sprintf(buf + len, "CH7_ISR=%08x\n", AMAZON_DMA_REG32(AMAZON_DMA_CH7_ISR)); - len += sprintf(buf + len, "CH8_ISR=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH8_ISR)); - len += - sprintf(buf + len, "CH9_ISR=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH9_ISR)); - len += - sprintf(buf + len, "CH10_ISR=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH10_ISR)); - len += - sprintf(buf + len, "CH11_ISR=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH11_ISR)); - len += - sprintf(buf + len, "LCH0_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK)); - len += - sprintf(buf + len, "LCH1_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH1_MSK)); - len += - sprintf(buf + len, "LCH2_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH2_MSK)); - len += - sprintf(buf + len, "LCH3_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH3_MSK)); - len += - sprintf(buf + len, "LCH4_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH4_MSK)); - len += - sprintf(buf + len, "LCH5_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH5_MSK)); - len += - sprintf(buf + len, "LCH6_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH6_MSK)); - len += - sprintf(buf + len, "LCH7_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH7_MSK)); - len += - sprintf(buf + len, "LCH8_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH8_MSK)); - len += - sprintf(buf + len, "LCH9_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH9_MSK)); - len += - sprintf(buf + len, "LCH10_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH10_MSK)); - len += - sprintf(buf + len, "LCH11_MSK=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH11_MSK)); - len += - sprintf(buf + len, "Desc_BA=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_Desc_BA)); - len += - sprintf(buf + len, "LCH0_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH0_DES_LEN)); - len += - sprintf(buf + len, "LCH1_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH1_DES_LEN)); - len += - sprintf(buf + len, "LCH2_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH2_DES_LEN)); - len += - sprintf(buf + len, "LCH3_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH3_DES_LEN)); - len += - sprintf(buf + len, "LCH4_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH4_DES_LEN)); - len += - sprintf(buf + len, "LCH5_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH5_DES_LEN)); - len += - sprintf(buf + len, "LCH6_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH6_DES_LEN)); - len += - sprintf(buf + len, "LCH7_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH7_DES_LEN)); - len += - sprintf(buf + len, "LCH8_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH8_DES_LEN)); - len += - sprintf(buf + len, "LCH9_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH9_DES_LEN)); - len += - sprintf(buf + len, "LCH10_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH10_DES_LEN)); - len += - sprintf(buf + len, "LCH11_DES_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH11_DES_LEN)); - len += - sprintf(buf + len, "LCH1_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH1_DES_OFST)); - len += - sprintf(buf + len, "LCH2_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH2_DES_OFST)); - len += - sprintf(buf + len, "LCH3_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH3_DES_OFST)); - len += - sprintf(buf + len, "LCH4_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH4_DES_OFST)); - len += - sprintf(buf + len, "LCH5_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH5_DES_OFST)); - len += - sprintf(buf + len, "LCH6_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH6_DES_OFST)); - len += - sprintf(buf + len, "LCH7_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH7_DES_OFST)); - len += - sprintf(buf + len, "LCH8_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH8_DES_OFST)); - len += - sprintf(buf + len, "LCH9_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH9_DES_OFST)); - len += - sprintf(buf + len, "LCH10_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH10_DES_OFST)); - len += - sprintf(buf + len, "LCH11_DES_OFST=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH11_DES_OFST)); - len += - sprintf(buf + len, "AMAZON_DMA_SW_BL=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_SW_BL)); - len += - sprintf(buf + len, "AMAZON_DMA_TPE_BL=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_TPE_BL)); - len += - sprintf(buf + len, "DPlus2FPI_BL=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_DPlus2FPI_BL)); - len += - sprintf(buf + len, "GRX_BUF_LEN=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_GRX_BUF_LEN)); - len += - sprintf(buf + len, "DMA_ECON_REG=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_DMA_ECON_REG)); - len += - sprintf(buf + len, "POLLING_REG=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_POLLING_REG)); - len += - sprintf(buf + len, "CH_WGT=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_CH_WGT)); - len += - sprintf(buf + len, "TX_WGT=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_TX_WGT)); - len += - sprintf(buf + len, "DPlus2FPI_CLASS=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_DPLus2FPI_CLASS)); - len += - sprintf(buf + len, "COMB_ISR=%08x\n", - AMAZON_DMA_REG32(AMAZON_DMA_COMB_ISR)); -#ifdef AMAZON_DMA_TPE_AAL5_RECOVERY - len += sprintf(buf + len, "TPE fails:%u\n", total_dma_tpe_reset); // 000004:fchang -#endif - return len; -} - -/* Brief: initialize DMA registers - * Description: - */ -static void dma_chip_init(void) -{ - int i; - for (i = 0; i < CHAN_TOTAL_NUM; i++) { - AMAZON_DMA_REG32(AMAZON_DMA_CH1_DES_OFST + - i * AMAZON_DMA_CH_STEP) = DEFAULT_OFFSET; - } -#ifdef DMA_NO_POLLING - AMAZON_DMA_REG32(AMAZON_DMA_POLLING_REG) = 0; -#else - // enable poll mode and set polling counter - AMAZON_DMA_REG32(AMAZON_DMA_POLLING_REG) = DMA_POLLING_CNT | DMA_POLLING_ENABLE; -#endif - // to enable DMA drop - AMAZON_DMA_REG32(AMAZON_DMA_GRX_BUF_LEN) = 0x10000; -} - -int insert_dev_list(dev_list * dev) -{ - dev_list *temp_dev; - if (g_head_dev == NULL) { - g_head_dev = dev; - g_tail_dev = dev; - dev->prev = NULL; - dev->next = NULL; - } else { - for (temp_dev = g_head_dev; temp_dev; temp_dev = temp_dev->next) { - if (temp_dev->weight < dev->weight) { - if (temp_dev->prev) - temp_dev->prev->next = dev; - - dev->prev = temp_dev->prev; - dev->next = temp_dev; - temp_dev->prev = dev; - if (temp_dev == g_head_dev) - g_head_dev = dev; - break; - } - } - - if (!temp_dev) { - g_tail_dev->next = dev; - dev->prev = g_tail_dev; - dev->next = NULL; - g_tail_dev = dev; - } - - } - - return 1; -} - -u8 *common_buffer_alloc(int len, int *byte_offset, void **opt) -{ - u8 *buffer = (u8 *) kmalloc(len * sizeof(u8), GFP_KERNEL); - *byte_offset = 0; - return buffer; - -} - -int common_buffer_free(u8 * dataptr, void *opt) -{ - if (dataptr) - kfree(dataptr); - return 0; -} - - -int register_dev(struct dma_device_info *dma_dev) -{ - int i, j, temp; - int burst_reg = 0; - u8 *buffer; - void *p = NULL; - int byte_offset = 0; - - struct rx_desc *rx_desc_p; - struct tx_desc *tx_desc_p; - if (strcmp(dma_dev->device_name, "switch1") == 0) { - AMAZON_DMA_REG32(AMAZON_DMA_CH_RST) = SWITCH1_RST_MASK; // resest - // channel - // 1st - AMAZON_DMA_REG32(AMAZON_DMA_DMA_ECON_REG) |= 0x3; // endian - // conversion - // for Switch - burst_reg = AMAZON_DMA_SW_BL; - dma_dev->logic_rx_chan_base = switch_rx_chan_base; - dma_dev->logic_tx_chan_base = switch_tx_chan_base; - } - - else if (strcmp(dma_dev->device_name, "switch2") == 0) { - AMAZON_DMA_REG32(AMAZON_DMA_CH_RST) = SWITCH2_RST_MASK; // resest - // channel - // 1st - AMAZON_DMA_REG32(AMAZON_DMA_DMA_ECON_REG) |= 0x3; // endian - // conversion - // for Switch - burst_reg = AMAZON_DMA_SW_BL; - dma_dev->logic_rx_chan_base = switch2_rx_chan_base; - dma_dev->logic_tx_chan_base = switch2_tx_chan_base; - - } else if (strcmp(dma_dev->device_name, "TPE") == 0) { - AMAZON_DMA_REG32(AMAZON_DMA_CH_RST) = TPE_RST_MASK; // resest - // channel 1st - // - burst_reg = AMAZON_DMA_TPE_BL; - dma_dev->logic_rx_chan_base = TPE_rx_chan_base; - dma_dev->logic_tx_chan_base = TPE_tx_chan_base; - } - - else if (strcmp(dma_dev->device_name, "DPlus") == 0) { - AMAZON_DMA_REG32(AMAZON_DMA_CH_RST) = DPlus2FPI_RST_MASK; // resest - // channel - // 1st - dma_dev->logic_rx_chan_base = DPLus2FPI_rx_chan_base; - dma_dev->logic_tx_chan_base = DPLus2FPI_tx_chan_base; - - } - - i = 0; - for (temp = dma_dev->tx_burst_len; temp > 2; temp /= 2) { - i += 1; - } - - - AMAZON_DMA_REG32(burst_reg) = i << 1; - i = 0; - for (temp = dma_dev->rx_burst_len; temp > 2; temp /= 2) { - i += 1; - } - AMAZON_DMA_REG32(burst_reg) += i; - - for (i = 0; i < dma_dev->num_rx_chan; i++) { - - temp = dma_dev->logic_rx_chan_base + i; - g_log_chan[temp].dma_dev = dma_dev; - g_log_chan[temp].weight = dma_dev->rx_chan[i].weight; - g_log_chan[temp].default_weight = dma_dev->rx_chan[i].weight; - g_log_chan[temp].current_desc = 0; - g_log_chan[temp].desc_ofst = DEFAULT_OFFSET; - g_log_chan[temp].desc_len = dma_dev->rx_chan[i].desc_num; - g_log_chan[temp].offset_from_base = temp * DEFAULT_OFFSET; - g_log_chan[temp].packet_size = dma_dev->rx_chan[i].packet_size; - - AMAZON_DMA_REG32(AMAZON_DMA_CH0_DES_LEN + temp * AMAZON_DMA_CH_STEP) = dma_dev->rx_chan[i].desc_num; - // enable interrupt mask - if (temp == 4 || temp == 5) { - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK + temp * AMAZON_DMA_CH_STEP) = 0x32; - } else { - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK + temp * AMAZON_DMA_CH_STEP) = 0x36; - } - strcpy(g_log_chan[temp].device_name, dma_dev->device_name); - g_log_chan[temp].burst_len = dma_dev->rx_burst_len; - g_log_chan[temp].control = dma_dev->rx_chan[i].control; - - - /* specify the buffer allocation and free method */ - if (dma_dev->buffer_alloc) - g_log_chan[temp].buffer_alloc = dma_dev->buffer_alloc; - else - g_log_chan[temp].buffer_alloc = common_buffer_alloc; - - if (dma_dev->buffer_free) - g_log_chan[temp].buffer_free = dma_dev->buffer_free; - else - g_log_chan[temp].buffer_free = common_buffer_free; - - if (dma_dev->intr_handler) - g_log_chan[temp].intr_handler = dma_dev->intr_handler; - else - g_log_chan[temp].intr_handler = NULL; - - for (j = 0; j < g_log_chan[temp].desc_len; j++) { - rx_desc_p = (struct rx_desc *) (g_desc_list + g_log_chan[temp].offset_from_base + j); - rx_desc_p->status.word = 0; - rx_desc_p->status.field.data_length = g_log_chan[temp].packet_size; - buffer = (u8 *) g_log_chan[temp].buffer_alloc(g_log_chan[temp].packet_size, &byte_offset, &p); - rx_desc_p->Data_Pointer = (u32) CPHYSADDR((u32) buffer); - rx_desc_p->status.field.byte_offset = byte_offset; - /* fix me, should check if the addresss comply with the burst - lenght requirment */ - g_log_chan[temp].opt[j] = p; - rx_desc_p->status.field.OWN = DMA_OWN; - - } - /* open or close the channel */ - if (g_log_chan[temp].control) - open_channel(temp); - else - close_channel(temp); - } - - for (i = 0; i < dma_dev->num_tx_chan; i++) { - temp = dma_dev->logic_tx_chan_base + i; - g_log_chan[temp].dma_dev = dma_dev; - g_log_chan[temp].weight = dma_dev->tx_chan[i].weight; - g_log_chan[temp].default_weight = dma_dev->tx_chan[i].weight; - g_log_chan[temp].current_desc = 0; - g_log_chan[temp].desc_ofst = DEFAULT_OFFSET; - g_log_chan[temp].desc_len = dma_dev->tx_chan[i].desc_num; - g_log_chan[temp].offset_from_base = temp * DEFAULT_OFFSET; - g_log_chan[temp].packet_size = dma_dev->tx_chan[i].packet_size; - - AMAZON_DMA_REG32(AMAZON_DMA_CH0_DES_LEN + temp * AMAZON_DMA_CH_STEP) = dma_dev->tx_chan[i].desc_num; - // enable interrupt mask -#ifdef NO_TX_INT - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK + temp * AMAZON_DMA_CH_STEP) = 0x3e; -#else - AMAZON_DMA_REG32(AMAZON_DMA_CH0_MSK + temp * AMAZON_DMA_CH_STEP) = 0x36; -#endif - - strcpy(g_log_chan[temp].device_name, dma_dev->device_name); - g_log_chan[temp].burst_len = dma_dev->tx_burst_len; - g_log_chan[temp].control = dma_dev->tx_chan[i].control; - - if (dma_dev->buffer_alloc) - g_log_chan[temp].buffer_alloc = dma_dev->buffer_alloc; - else - g_log_chan[temp].buffer_alloc = common_buffer_alloc; - - if (dma_dev->buffer_free) - g_log_chan[temp].buffer_free = dma_dev->buffer_free; - else - g_log_chan[temp].buffer_free = common_buffer_free; - - if (dma_dev->intr_handler) - g_log_chan[temp].intr_handler = dma_dev->intr_handler; - else - g_log_chan[temp].intr_handler = NULL; - - for (j = 0; j < g_log_chan[temp].desc_len; j++) { - - tx_desc_p = - (struct tx_desc *) (g_desc_list + - g_log_chan[temp].offset_from_base + j); - tx_desc_p->status.word = 0; - tx_desc_p->status.field.data_length = - g_log_chan[temp].packet_size; - tx_desc_p->status.field.OWN = CPU_OWN; - - } - /* workaround DMA pitfall, we never turn on channel if we don't - have proper descriptors */ - if (!g_log_chan[temp].control) { - close_channel(temp); - } - - } - - return 0; -} - -int dma_device_register(struct dma_device_info *dma_dev) -{ - dev_list *temp_dev; - temp_dev = (dev_list *) kmalloc(sizeof(dev_list), GFP_KERNEL); - temp_dev->dev = dma_dev; - temp_dev->weight = dma_dev->weight; - insert_dev_list(temp_dev); - /* check whether this is a known device */ - if ((strcmp(dma_dev->device_name, "switch1") == 0) - || (strcmp(dma_dev->device_name, "TPE") == 0) - || (strcmp(dma_dev->device_name, "switch2") == 0) - || (strcmp(dma_dev->device_name, "DPlus") == 0)) { - register_dev(dma_dev); - } - - return 0; -} - - -int unregister_dev(struct dma_device_info *dma_dev) -{ - int i, j, temp; - u8 *buffer; - struct rx_desc *rx_desc_p; - - for (i = 0; i < dma_dev->num_rx_chan; i++) { - temp = dma_dev->logic_rx_chan_base + i; - close_channel(temp); - for (j = 0; j < g_log_chan[temp].desc_len; j++) { - rx_desc_p = - (struct rx_desc *) (g_desc_list + - g_log_chan[temp].offset_from_base + j); - buffer = (u8 *) __va(rx_desc_p->Data_Pointer); - g_log_chan[temp].buffer_free(buffer, g_log_chan[temp].opt[j]); - } - } - for (i = 0; i < dma_dev->num_tx_chan; i++) { - temp = dma_dev->logic_tx_chan_base + i; - close_channel(temp); - } - return 0; -} - -int dma_device_unregister(struct dma_device_info *dev) -{ - dev_list *temp_dev; - for (temp_dev = g_head_dev; temp_dev; temp_dev = temp_dev->next) { - if (strcmp(dev->device_name, temp_dev->dev->device_name) == 0) { - if ((strcmp(dev->device_name, "switch1") == 0) - || (strcmp(dev->device_name, "TPE") == 0) - || (strcmp(dev->device_name, "switch2") == 0) - || (strcmp(dev->device_name, "DPlus") == 0)) - unregister_dev(dev); - if (temp_dev == g_head_dev) { - g_head_dev = temp_dev->next; - kfree(temp_dev); - } else { - if (temp_dev == g_tail_dev) - g_tail_dev = temp_dev->prev; - if (temp_dev->prev) - temp_dev->prev->next = temp_dev->next; - if (temp_dev->next) - temp_dev->next->prev = temp_dev->prev; - kfree(temp_dev); - } - break; - } - - } - return 0; -} - -void dma_device_update_rx(struct dma_device_info *dma_dev) -{ - int i, temp; - for (i = 0; i < dma_dev->num_rx_chan; i++) { - temp = dma_dev->logic_rx_chan_base + i; - g_log_chan[temp].control = dma_dev->rx_chan[i].control; - - if (g_log_chan[temp].control) - open_channel(temp); - else - close_channel(temp); - } - -} - -void dma_device_update_tx(struct dma_device_info *dma_dev) -{ - int i, temp; - for (i = 0; i < dma_dev->num_tx_chan; i++) { - temp = dma_dev->logic_tx_chan_base + i; - g_log_chan[temp].control = dma_dev->tx_chan[i].control; - if (g_log_chan[temp].control) { - /* we turn on channel when send out the very first packet */ - // open_channel(temp); - } else - close_channel(temp); - } -} - -int dma_device_update(struct dma_device_info *dma_dev) -{ - dma_device_update_rx(dma_dev); - dma_device_update_tx(dma_dev); - return 0; -} - -static int dma_open(struct inode *inode, struct file *file) -{ - return 0; -} - -static int dma_release(struct inode *inode, struct file *file) -{ - /* release the resources */ - return 0; -} - -static int dma_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) -{ - int value = 0; - int result = 0; - int chan_no = 0; - - switch (cmd) { - case 0: /* get register value */ - break; - case 1: /* return channel weight */ - chan_no = *((int *) arg); - *((int *) arg + 1) = g_log_chan[chan_no].default_weight; - break; - case 2: /* set channel weight */ - chan_no = *((int *) arg); - value = *((int *) arg + 1); - printk("new weight=%08x\n", value); - g_log_chan[chan_no].default_weight = value; - break; - default: - break; - } - return result; -} - - -static struct file_operations dma_fops = { - owner:THIS_MODULE, - open:dma_open, - release:dma_release, - ioctl:dma_ioctl, -}; - -static int dma_init(void) -{ - int result = 0; - int i; - printk("initialising dma core\n"); - result = register_chrdev(DMA_MAJOR, "dma-core", &dma_fops); - if (result) { - AMAZON_DMA_EMSG("cannot register device dma-core!\n"); - return result; - } - result = request_irq(AMAZON_DMA_INT, dma_interrupt, SA_INTERRUPT, "dma-core", (void *) &dma_interrupt); - if (result) { - AMAZON_DMA_EMSG("error, cannot get dma_irq!\n"); - free_irq(AMAZON_DMA_INT, (void *) &dma_interrupt); - return -EFAULT; - } - - g_desc_list = (u64 *) KSEG1ADDR(__get_free_page(GFP_DMA)); - - if (g_desc_list == NULL) { - AMAZON_DMA_EMSG("no memory for desriptor\n"); - return -ENOMEM; - } - memset(g_desc_list, 0, PAGE_SIZE); - AMAZON_DMA_REG32(AMAZON_DMA_Desc_BA) = (u32) CPHYSADDR((u32) g_desc_list); - g_amazon_dma_dir = proc_mkdir("amazon_dma", NULL); - create_proc_read_entry("dma_register", 0, g_amazon_dma_dir, dma_register_proc_read, NULL); - create_proc_read_entry("g_desc_list", 0, g_amazon_dma_dir, desc_list_proc_read, NULL); - create_proc_read_entry("channel_weight", 0, g_amazon_dma_dir, channel_weight_proc_read, NULL); - - dma_chip_init(); - for (i = 0; i < (RX_CHAN_NUM + 1); i++) { - rx_chan_list[i] = -1; - } - for (i = 0; i < (TX_CHAN_NUM + 1); i++) { - tx_chan_list[i] = -1; - } - - for (i = 0; i < CHAN_TOTAL_NUM; i++) { - comb_isr_mask[i] = 0x80000000 >> (i); - } - - g_log_chan[CHAN_TOTAL_NUM].weight = 0; - printk("initialising dma core ... done\n"); - - return 0; -} - -arch_initcall(dma_init); - - -void dma_cleanup(void) -{ - dev_list *temp_dev; - - unregister_chrdev(DMA_MAJOR, "dma-core"); - for (temp_dev = g_head_dev; temp_dev; temp_dev = temp_dev->next) { - kfree(temp_dev); - } - free_page(KSEG0ADDR((unsigned long) g_desc_list)); - remove_proc_entry("channel_weight", g_amazon_dma_dir); - remove_proc_entry("dma_list", g_amazon_dma_dir); - remove_proc_entry("dma_register", g_amazon_dma_dir); - remove_proc_entry("amazon_dma", NULL); - /* release the resources */ - free_irq(AMAZON_DMA_INT, (void *) &dma_interrupt); -} - -EXPORT_SYMBOL(dma_device_register); -EXPORT_SYMBOL(dma_device_unregister); -EXPORT_SYMBOL(dma_device_read); -EXPORT_SYMBOL(dma_device_write); -EXPORT_SYMBOL(dma_device_update); -EXPORT_SYMBOL(dma_device_update_rx); - -MODULE_LICENSE("GPL"); |