diff options
| -rw-r--r-- | drivers/char/synclink_gt.c | 58 | ||||
| -rw-r--r-- | include/linux/synclink.h | 1 |
2 files changed, 39 insertions, 20 deletions
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 6ec6e13..5e25649 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -298,6 +298,7 @@ struct slgt_info { unsigned int rbuf_fill_level; unsigned int if_mode; + unsigned int base_clock; /* device status */ @@ -1156,22 +1157,26 @@ static long set_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *ne return -EFAULT; spin_lock(&info->lock); - info->params.mode = tmp_params.mode; - info->params.loopback = tmp_params.loopback; - info->params.flags = tmp_params.flags; - info->params.encoding = tmp_params.encoding; - info->params.clock_speed = tmp_params.clock_speed; - info->params.addr_filter = tmp_params.addr_filter; - info->params.crc_type = tmp_params.crc_type; - info->params.preamble_length = tmp_params.preamble_length; - info->params.preamble = tmp_params.preamble; - info->params.data_rate = tmp_params.data_rate; - info->params.data_bits = tmp_params.data_bits; - info->params.stop_bits = tmp_params.stop_bits; - info->params.parity = tmp_params.parity; + if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) { + info->base_clock = tmp_params.clock_speed; + } else { + info->params.mode = tmp_params.mode; + info->params.loopback = tmp_params.loopback; + info->params.flags = tmp_params.flags; + info->params.encoding = tmp_params.encoding; + info->params.clock_speed = tmp_params.clock_speed; + info->params.addr_filter = tmp_params.addr_filter; + info->params.crc_type = tmp_params.crc_type; + info->params.preamble_length = tmp_params.preamble_length; + info->params.preamble = tmp_params.preamble; + info->params.data_rate = tmp_params.data_rate; + info->params.data_bits = tmp_params.data_bits; + info->params.stop_bits = tmp_params.stop_bits; + info->params.parity = tmp_params.parity; + } spin_unlock(&info->lock); - change_params(info); + program_hw(info); return 0; } @@ -2559,10 +2564,13 @@ static int set_params(struct slgt_info *info, MGSL_PARAMS __user *new_params) return -EFAULT; spin_lock_irqsave(&info->lock, flags); - memcpy(&info->params, &tmp_params, sizeof(MGSL_PARAMS)); + if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) + info->base_clock = tmp_params.clock_speed; + else + memcpy(&info->params, &tmp_params, sizeof(MGSL_PARAMS)); spin_unlock_irqrestore(&info->lock, flags); - change_params(info); + program_hw(info); return 0; } @@ -3432,6 +3440,7 @@ static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev info->magic = MGSL_MAGIC; INIT_WORK(&info->task, bh_handler); info->max_frame_size = 4096; + info->base_clock = 14745600; info->rbuf_fill_level = DMABUFSIZE; info->port.close_delay = 5*HZ/10; info->port.closing_wait = 30*HZ; @@ -3779,7 +3788,7 @@ static void enable_loopback(struct slgt_info *info) static void set_rate(struct slgt_info *info, u32 rate) { unsigned int div; - static unsigned int osc = 14745600; + unsigned int osc = info->base_clock; /* div = osc/rate - 1 * @@ -4083,18 +4092,27 @@ static void async_mode(struct slgt_info *info) * 06 CTS IRQ enable * 05 DCD IRQ enable * 04 RI IRQ enable - * 03 reserved, must be zero + * 03 0=16x sampling, 1=8x sampling * 02 1=txd->rxd internal loopback enable * 01 reserved, must be zero * 00 1=master IRQ enable */ val = BIT15 + BIT14 + BIT0; + /* JCR[8] : 1 = x8 async mode feature available */ + if ((rd_reg32(info, JCR) & BIT8) && info->params.data_rate && + ((info->base_clock < (info->params.data_rate * 16)) || + (info->base_clock % (info->params.data_rate * 16)))) { + /* use 8x sampling */ + val |= BIT3; + set_rate(info, info->params.data_rate * 8); + } else { + /* use 16x sampling */ + set_rate(info, info->params.data_rate * 16); + } wr_reg16(info, SCR, val); slgt_irq_on(info, IRQ_RXBREAK | IRQ_RXOVER); - set_rate(info, info->params.data_rate * 16); - if (info->params.loopback) enable_loopback(info); } diff --git a/include/linux/synclink.h b/include/linux/synclink.h index 99b8bdb..0ff2779 100644 --- a/include/linux/synclink.h +++ b/include/linux/synclink.h @@ -125,6 +125,7 @@ #define MGSL_MODE_MONOSYNC 3 #define MGSL_MODE_BISYNC 4 #define MGSL_MODE_RAW 6 +#define MGSL_MODE_BASE_CLOCK 7 #define MGSL_BUS_TYPE_ISA 1 #define MGSL_BUS_TYPE_EISA 2 |