sparc: Convert uctrl driver to OF driver.
Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
David S. Miller
parent
a9540d3422
commit
237f8aafa3
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@ -32,7 +32,7 @@ config OBP_FLASH
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config TADPOLE_TS102_UCTRL
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tristate "Tadpole TS102 Microcontroller support (EXPERIMENTAL)"
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depends on EXPERIMENTAL && SPARC32
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depends on EXPERIMENTAL
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help
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Say Y here to directly support the TS102 Microcontroller interface
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on the Tadpole Sparcbook 3. This device handles power-management
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@ -1,7 +1,7 @@
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/* $Id: uctrl.c,v 1.12 2001/10/08 22:19:51 davem Exp $
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* uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
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/* uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
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*
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* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
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* Copyright 2008 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/module.h>
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@ -14,6 +14,8 @@
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#include <linux/init.h>
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#include <linux/miscdevice.h>
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#include <linux/mm.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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@ -21,7 +23,6 @@
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/sbus.h>
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#define UCTRL_MINOR 174
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@ -33,26 +34,26 @@
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#endif
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struct uctrl_regs {
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volatile u32 uctrl_intr;
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volatile u32 uctrl_data;
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volatile u32 uctrl_stat;
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volatile u32 uctrl_xxx[5];
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u32 uctrl_intr;
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u32 uctrl_data;
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u32 uctrl_stat;
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u32 uctrl_xxx[5];
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};
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struct ts102_regs {
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volatile u32 card_a_intr;
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volatile u32 card_a_stat;
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volatile u32 card_a_ctrl;
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volatile u32 card_a_xxx;
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volatile u32 card_b_intr;
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volatile u32 card_b_stat;
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volatile u32 card_b_ctrl;
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volatile u32 card_b_xxx;
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volatile u32 uctrl_intr;
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volatile u32 uctrl_data;
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volatile u32 uctrl_stat;
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volatile u32 uctrl_xxx;
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volatile u32 ts102_xxx[4];
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u32 card_a_intr;
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u32 card_a_stat;
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u32 card_a_ctrl;
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u32 card_a_xxx;
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u32 card_b_intr;
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u32 card_b_stat;
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u32 card_b_ctrl;
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u32 card_b_xxx;
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u32 uctrl_intr;
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u32 uctrl_data;
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u32 uctrl_stat;
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u32 uctrl_xxx;
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u32 ts102_xxx[4];
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};
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/* Bits for uctrl_intr register */
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@ -186,17 +187,15 @@ enum uctrl_opcode {
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POWER_RESTART=0x83,
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};
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struct uctrl_driver {
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struct uctrl_regs *regs;
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static struct uctrl_driver {
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struct uctrl_regs __iomem *regs;
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int irq;
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int pending;
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struct uctrl_status status;
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};
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} *global_driver;
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static struct uctrl_driver drv;
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static void uctrl_get_event_status(void);
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static void uctrl_get_external_status(void);
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static void uctrl_get_event_status(struct uctrl_driver *);
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static void uctrl_get_external_status(struct uctrl_driver *);
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static int
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uctrl_ioctl(struct inode *inode, struct file *file,
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@ -213,16 +212,14 @@ static int
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uctrl_open(struct inode *inode, struct file *file)
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{
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lock_kernel();
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uctrl_get_event_status();
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uctrl_get_external_status();
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uctrl_get_event_status(global_driver);
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uctrl_get_external_status(global_driver);
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unlock_kernel();
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return 0;
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}
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static irqreturn_t uctrl_interrupt(int irq, void *dev_id)
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{
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struct uctrl_driver *driver = (struct uctrl_driver *)dev_id;
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printk("in uctrl_interrupt\n");
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return IRQ_HANDLED;
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}
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@ -244,11 +241,11 @@ static struct miscdevice uctrl_dev = {
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{ \
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unsigned int i; \
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for (i = 0; i < 10000; i++) { \
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if (UCTRL_STAT_TXNF_STA & driver->regs->uctrl_stat) \
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if (UCTRL_STAT_TXNF_STA & sbus_readl(&driver->regs->uctrl_stat)) \
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break; \
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} \
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dprintk(("write data 0x%02x\n", value)); \
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driver->regs->uctrl_data = value; \
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sbus_writel(value, &driver->regs->uctrl_data); \
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}
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/* Wait for something to read, read it, then clear the bit */
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@ -257,24 +254,23 @@ static struct miscdevice uctrl_dev = {
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unsigned int i; \
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value = 0; \
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for (i = 0; i < 10000; i++) { \
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if ((UCTRL_STAT_RXNE_STA & driver->regs->uctrl_stat) == 0) \
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if ((UCTRL_STAT_RXNE_STA & sbus_readl(&driver->regs->uctrl_stat)) == 0) \
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break; \
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udelay(1); \
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} \
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value = driver->regs->uctrl_data; \
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value = sbus_readl(&driver->regs->uctrl_data); \
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dprintk(("read data 0x%02x\n", value)); \
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driver->regs->uctrl_stat = UCTRL_STAT_RXNE_STA; \
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sbus_writel(UCTRL_STAT_RXNE_STA, &driver->regs->uctrl_stat); \
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}
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static void uctrl_do_txn(struct uctrl_txn *txn)
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static void uctrl_do_txn(struct uctrl_driver *driver, struct uctrl_txn *txn)
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{
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struct uctrl_driver *driver = &drv;
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int stat, incnt, outcnt, bytecnt, intr;
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u32 byte;
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stat = driver->regs->uctrl_stat;
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intr = driver->regs->uctrl_intr;
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driver->regs->uctrl_stat = stat;
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stat = sbus_readl(&driver->regs->uctrl_stat);
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intr = sbus_readl(&driver->regs->uctrl_intr);
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sbus_writel(stat, &driver->regs->uctrl_stat);
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dprintk(("interrupt stat 0x%x int 0x%x\n", stat, intr));
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@ -305,9 +301,8 @@ static void uctrl_do_txn(struct uctrl_txn *txn)
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}
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}
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static void uctrl_get_event_status(void)
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static void uctrl_get_event_status(struct uctrl_driver *driver)
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{
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struct uctrl_driver *driver = &drv;
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struct uctrl_txn txn;
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u8 outbits[2];
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@ -317,7 +312,7 @@ static void uctrl_get_event_status(void)
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txn.inbuf = NULL;
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txn.outbuf = outbits;
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uctrl_do_txn(&txn);
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uctrl_do_txn(driver, &txn);
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dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
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driver->status.event_status =
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@ -325,9 +320,8 @@ static void uctrl_get_event_status(void)
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dprintk(("ev is %x\n", driver->status.event_status));
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}
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static void uctrl_get_external_status(void)
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static void uctrl_get_external_status(struct uctrl_driver *driver)
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{
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struct uctrl_driver *driver = &drv;
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struct uctrl_txn txn;
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u8 outbits[2];
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int i, v;
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@ -338,7 +332,7 @@ static void uctrl_get_external_status(void)
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txn.inbuf = NULL;
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txn.outbuf = outbits;
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uctrl_do_txn(&txn);
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uctrl_do_txn(driver, &txn);
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dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
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driver->status.external_status =
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@ -354,71 +348,101 @@ static void uctrl_get_external_status(void)
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}
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static int __init ts102_uctrl_init(void)
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static int __devinit uctrl_probe(struct of_device *op,
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const struct of_device_id *match)
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{
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struct uctrl_driver *driver = &drv;
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int len;
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struct linux_prom_irqs tmp_irq[2];
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unsigned int vaddr[2] = { 0, 0 };
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int tmpnode, uctrlnode = prom_getchild(prom_root_node);
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int err;
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struct uctrl_driver *p;
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int err = -ENOMEM;
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tmpnode = prom_searchsiblings(uctrlnode, "obio");
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p = kzalloc(sizeof(*p), GFP_KERNEL);
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if (!p) {
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printk(KERN_ERR "uctrl: Unable to allocate device struct.\n");
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goto out;
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}
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if (tmpnode)
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uctrlnode = prom_getchild(tmpnode);
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p->regs = of_ioremap(&op->resource[0], 0,
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resource_size(&op->resource[0]),
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"uctrl");
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if (!p->regs) {
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printk(KERN_ERR "uctrl: Unable to map registers.\n");
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goto out_free;
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}
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uctrlnode = prom_searchsiblings(uctrlnode, "uctrl");
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if (!uctrlnode)
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return -ENODEV;
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/* the prom mapped it for us */
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len = prom_getproperty(uctrlnode, "address", (void *) vaddr,
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sizeof(vaddr));
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driver->regs = (struct uctrl_regs *)vaddr[0];
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len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq,
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sizeof(tmp_irq));
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/* Flush device */
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READUCTLDATA(len);
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if(!driver->irq)
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driver->irq = tmp_irq[0].pri;
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err = request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
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p->irq = op->irqs[0];
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err = request_irq(p->irq, uctrl_interrupt, 0, "uctrl", p);
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if (err) {
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printk("%s: unable to register irq %d\n",
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__func__, driver->irq);
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return err;
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printk(KERN_ERR "uctrl: Unable to register irq.\n");
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goto out_iounmap;
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}
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if (misc_register(&uctrl_dev)) {
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printk("%s: unable to get misc minor %d\n",
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__func__, uctrl_dev.minor);
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free_irq(driver->irq, driver);
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return -ENODEV;
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err = misc_register(&uctrl_dev);
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if (err) {
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printk(KERN_ERR "uctrl: Unable to register misc device.\n");
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goto out_free_irq;
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}
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driver->regs->uctrl_intr = UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK;
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printk("uctrl: 0x%p (irq %d)\n", driver->regs, driver->irq);
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uctrl_get_event_status();
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uctrl_get_external_status();
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return 0;
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sbus_writel(UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK, &p->regs->uctrl_intr);
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printk(KERN_INFO "%s: uctrl regs[0x%p] (irq %d)\n",
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op->node->full_name, p->regs, p->irq);
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uctrl_get_event_status(p);
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uctrl_get_external_status(p);
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dev_set_drvdata(&op->dev, p);
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global_driver = p;
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out:
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return err;
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out_free_irq:
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free_irq(p->irq, p);
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out_iounmap:
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of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
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out_free:
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kfree(p);
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goto out;
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}
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static void __exit ts102_uctrl_cleanup(void)
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static int __devexit uctrl_remove(struct of_device *op)
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{
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struct uctrl_driver *driver = &drv;
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struct uctrl_driver *p = dev_get_drvdata(&op->dev);
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misc_deregister(&uctrl_dev);
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if (driver->irq)
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free_irq(driver->irq, driver);
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if (driver->regs)
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driver->regs = NULL;
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if (p) {
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misc_deregister(&uctrl_dev);
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free_irq(p->irq, p);
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of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
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kfree(p);
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}
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return 0;
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}
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module_init(ts102_uctrl_init);
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module_exit(ts102_uctrl_cleanup);
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static struct of_device_id uctrl_match[] = {
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{
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.name = "uctrl",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, uctrl_match);
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static struct of_platform_driver uctrl_driver = {
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.name = "uctrl",
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.match_table = uctrl_match,
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.probe = uctrl_probe,
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.remove = __devexit_p(uctrl_remove),
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};
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static int __init uctrl_init(void)
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{
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return of_register_driver(&uctrl_driver, &of_bus_type);
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}
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static void __exit uctrl_exit(void)
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{
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of_unregister_driver(&uctrl_driver);
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}
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module_init(uctrl_init);
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module_exit(uctrl_exit);
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MODULE_LICENSE("GPL");
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