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Message-Id: <1240384003-25499-2-git-send-email-jirislaby@gmail.com>
Date: Wed, 22 Apr 2009 09:06:39 +0200
From: Jiri Slaby <jirislaby@...il.com>
To: akpm@...ux-foundation.org
Cc: alan@...rguk.ukuu.org.uk, linux-kernel@...r.kernel.org,
Jiri Slaby <jirislaby@...il.com>
Subject: [PATCH 2/6] Char: cyclades, cache HW version
Store HW version locally to not read it all the time in interrupts
and alike.
Signed-off-by: Jiri Slaby <jirislaby@...il.com>
---
drivers/char/cyclades.c | 32 +++++++++++---------------------
include/linux/cyclades.h | 1 +
2 files changed, 12 insertions(+), 21 deletions(-)
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 2cbf741..cf191cc 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -668,8 +668,7 @@ static void cy_send_xchar(struct tty_struct *tty, char ch);
#define Z_FPGA_CHECK(card) \
((readl(&(card).ctl_addr.p9060->init_ctrl) & (1<<17)) != 0)
-#define ISZLOADED(card) (((ZO_V1 == readl(&(card).ctl_addr.p9060->mail_box_0)) \
- || Z_FPGA_CHECK(card)) && \
+#define ISZLOADED(card) ((ZO_V1 == (card).hw_ver || Z_FPGA_CHECK(card)) && \
(ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
((card).base_addr+ID_ADDRESS))->signature)))
@@ -1393,8 +1392,6 @@ cyz_fetch_msg(struct cyclades_card *cinfo,
unsigned long loc_doorbell;
firm_id = cinfo->base_addr + ID_ADDRESS;
- if (!ISZLOADED(*cinfo))
- return -1;
zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
board_ctrl = &zfw_ctrl->board_ctrl;
@@ -1619,10 +1616,8 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
static struct BOARD_CTRL __iomem *board_ctrl;
static struct CH_CTRL __iomem *ch_ctrl;
static struct BUF_CTRL __iomem *buf_ctrl;
- __u32 channel;
+ __u32 channel, param, fw_ver;
__u8 cmd;
- __u32 param;
- __u32 hw_ver, fw_ver;
int special_count;
int delta_count;
@@ -1630,7 +1625,6 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
board_ctrl = &zfw_ctrl->board_ctrl;
fw_ver = readl(&board_ctrl->fw_version);
- hw_ver = readl(&cinfo->ctl_addr.p9060->mail_box_0);
while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
special_count = 0;
@@ -2388,11 +2382,9 @@ static int cy_open(struct tty_struct *tty, struct file *filp)
struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
if (!ISZLOADED(*cinfo)) {
- if (((ZE_V1 == readl(&cinfo->ctl_addr.p9060->
- mail_box_0)) &&
- Z_FPGA_CHECK(*cinfo)) &&
- (ZFIRM_HLT == readl(
- &firm_id->signature))) {
+ if (cinfo->hw_ver == ZE_V1 && Z_FPGA_CHECK(*cinfo) &&
+ readl(&firm_id->signature) ==
+ ZFIRM_HLT) {
printk(KERN_ERR "cyc:Cyclades-Z Error: you "
"need an external power supply for "
"this number of ports.\nFirmware "
@@ -4336,7 +4328,6 @@ static void cy_hangup(struct tty_struct *tty)
static int __devinit cy_init_card(struct cyclades_card *cinfo)
{
struct cyclades_port *info;
- u32 uninitialized_var(mailbox);
unsigned int nports, port;
unsigned short chip_number;
int uninitialized_var(index);
@@ -4344,8 +4335,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
spin_lock_init(&cinfo->card_lock);
if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
- mailbox = readl(&cinfo->ctl_addr.p9060->mail_box_0);
- nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
+ nports = (cinfo->hw_ver == ZE_V1) ? ZE_V1_NPORTS : 8;
cinfo->intr_enabled = 0;
cinfo->nports = 0; /* Will be correctly set later, after
Z FW is loaded */
@@ -4377,7 +4367,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
if (IS_CYC_Z(*cinfo)) {
info->type = PORT_STARTECH;
- if (mailbox == ZO_V1)
+ if (cinfo->hw_ver == ZO_V1)
info->xmit_fifo_size = CYZ_FIFO_SIZE;
else
info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
@@ -4932,7 +4922,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
{
void __iomem *addr0 = NULL, *addr2 = NULL;
char *card_name = NULL;
- u32 mailbox;
+ u32 uninitialized_var(mailbox);
unsigned int device_id, nchan = 0, card_no, i;
unsigned char plx_ver;
int retval, irq;
@@ -5014,7 +5004,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
plx_init(pdev, irq, addr0);
- mailbox = (u32)readl(&ctl_addr->mail_box_0);
+ mailbox = readl(&ctl_addr->mail_box_0);
addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
@@ -5026,7 +5016,6 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
if (mailbox == ZE_V1) {
card_name = "Cyclades-Ze";
- readl(&ctl_addr->mail_box_0);
nchan = ZE_V1_NPORTS;
} else {
card_name = "Cyclades-8Zo";
@@ -5089,6 +5078,8 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
}
cy_card[card_no].num_chips = nchan / 4;
} else {
+ cy_card[card_no].hw_ver = mailbox;
+ cy_card[card_no].num_chips = (unsigned int)-1;
#ifdef CONFIG_CYZ_INTR
/* allocate IRQ only if board has an IRQ */
if (irq != 0 && irq != 255) {
@@ -5101,7 +5092,6 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev,
}
}
#endif /* CONFIG_CYZ_INTR */
- cy_card[card_no].num_chips = (unsigned int)-1;
}
/* set cy_card */
diff --git a/include/linux/cyclades.h b/include/linux/cyclades.h
index 9ae03d5..a14fe30 100644
--- a/include/linux/cyclades.h
+++ b/include/linux/cyclades.h
@@ -518,6 +518,7 @@ struct cyclades_card {
unsigned int nports; /* Number of ports in the card */
int bus_index; /* address shift - 0 for ISA, 1 for PCI */
int intr_enabled; /* FW Interrupt flag - 0 disabled, 1 enabled */
+ u32 hw_ver;
spinlock_t card_lock;
struct cyclades_port *ports;
};
--
1.6.2.3
--
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