diff options
| -rw-r--r-- | drivers/pcmcia/o2micro.h | 45 | ||||
| -rw-r--r-- | drivers/pcmcia/yenta_socket.c | 5 |
2 files changed, 34 insertions, 16 deletions
diff --git a/drivers/pcmcia/o2micro.h b/drivers/pcmcia/o2micro.h index 624442fc0d35..e74bebac2695 100644 --- a/drivers/pcmcia/o2micro.h +++ b/drivers/pcmcia/o2micro.h @@ -116,13 +116,12 @@ static int o2micro_override(struct yenta_socket *socket) * from Eric Still, 02Micro. */ u8 a, b; + bool use_speedup; if (PCI_FUNC(socket->dev->devfn) == 0) { a = config_readb(socket, O2_RESERVED1); b = config_readb(socket, O2_RESERVED2); - - dev_printk(KERN_INFO, &socket->dev->dev, - "O2: res at 0x94/0xD4: %02x/%02x\n", a, b); + dev_dbg(&socket->dev->dev, "O2: 0x94/0xD4: %02x/%02x\n", a, b); switch (socket->dev->device) { /* @@ -135,23 +134,37 @@ static int o2micro_override(struct yenta_socket *socket) case PCI_DEVICE_ID_O2_6812: case PCI_DEVICE_ID_O2_6832: case PCI_DEVICE_ID_O2_6836: - case PCI_DEVICE_ID_O2_6933: - dev_printk(KERN_INFO, &socket->dev->dev, - "Yenta O2: old bridge, disabling read " - "prefetch/write burst\n"); - config_writeb(socket, O2_RESERVED1, - a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); - config_writeb(socket, O2_RESERVED2, - b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); + case PCI_DEVICE_ID_O2_6933: + use_speedup = false; break; - default: - dev_printk(KERN_INFO , &socket->dev->dev, - "O2: enabling read prefetch/write burst\n"); + use_speedup = true; + break; + } + + /* the user may override our decision */ + if (strcasecmp(o2_speedup, "on") == 0) + use_speedup = true; + else if (strcasecmp(o2_speedup, "off") == 0) + use_speedup = false; + else if (strcasecmp(o2_speedup, "default") != 0) + dev_warn(&socket->dev->dev, + "O2: Unknown parameter, using 'default'"); + + if (use_speedup) { + dev_info(&socket->dev->dev, + "O2: enabling read prefetch/write burst\n"); + config_writeb(socket, O2_RESERVED1, + a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); + config_writeb(socket, O2_RESERVED2, + b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); + } else { + dev_info(&socket->dev->dev, + "O2: disabling read prefetch/write burst\n"); config_writeb(socket, O2_RESERVED1, - a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); + a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); config_writeb(socket, O2_RESERVED2, - b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST); + b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST)); } } diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index e4d12acdd525..041a75a7e55e 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -37,6 +37,11 @@ static int pwr_irqs_off; module_param(pwr_irqs_off, bool, 0644); MODULE_PARM_DESC(pwr_irqs_off, "Force IRQs off during power-on of slot. Use only when seeing IRQ storms!"); +static char o2_speedup[] = "default"; +module_param_string(o2_speedup, o2_speedup, sizeof(o2_speedup), 0444); +MODULE_PARM_DESC(o2_speedup, "Use prefetch/burst for O2-bridges: 'on', 'off' " + "or 'default' (uses recommended behaviour for the detected bridge)"); + #define debug(x, s, args...) dev_dbg(&s->dev->dev, x, ##args) /* Don't ask.. */ |