diff options
author | H Hartley Sweeten <hartleys@visionengravers.com> | 2010-06-22 23:38:50 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-23 22:22:36 (GMT) |
commit | 55bb6ece160f4598a79dd484950461545f6e6638 (patch) | |
tree | 73d0b864cacf19b9eb8e796fc2bb0522b302eefd | |
parent | 4b50fb4042a9e39cd24b411546020d6b56ff519b (diff) | |
download | linux-fsl-qoriq-55bb6ece160f4598a79dd484950461545f6e6638.tar.xz |
Staging: dt3155: Cleanup memory mapped i/o access
The macros ReadMReg and WriteMReg are really just private versions of
the kernel's readl and writel functions. Use the kernel's functions
instead. And since ioremap returns a (void __iomem *) not a (u8 *),
change all the uses of dt3155_lbase to reflect this.
While here, make dt3155_lbase static since it is only used in the
dt3155_drv.c file. Also, remove the global variable dt3155_bbase
since it is not used anywhere in the code.
Where is makes sense, create a local 'mmio' variable instead of using
dt3155_lbase[minor] to make the code more readable.
This change also affects the {Read|Write}I2C functions so they are
also modified as needed.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Scott Smedley <ss@aao.gov.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/staging/dt3155/dt3155_drv.c | 81 | ||||
-rw-r--r-- | drivers/staging/dt3155/dt3155_drv.h | 6 | ||||
-rw-r--r-- | drivers/staging/dt3155/dt3155_io.c | 24 | ||||
-rw-r--r-- | drivers/staging/dt3155/dt3155_io.h | 9 |
4 files changed, 53 insertions, 67 deletions
diff --git a/drivers/staging/dt3155/dt3155_drv.c b/drivers/staging/dt3155/dt3155_drv.c index dcd3849..88c9e59 100644 --- a/drivers/staging/dt3155/dt3155_drv.c +++ b/drivers/staging/dt3155/dt3155_drv.c @@ -64,8 +64,8 @@ extern void printques(int); #include <linux/poll.h> #include <linux/sched.h> #include <linux/smp_lock.h> +#include <linux/io.h> -#include <asm/io.h> #include <asm/uaccess.h> #include "dt3155.h" @@ -112,14 +112,12 @@ int dt3155_major = 0; struct dt3155_status dt3155_status[MAXBOARDS]; /* kernel logical address of the board */ -u8 *dt3155_lbase[MAXBOARDS] = { NULL +static void __iomem *dt3155_lbase[MAXBOARDS] = { NULL #if MAXBOARDS == 2 , NULL #endif }; -/* DT3155 registers */ -u8 *dt3155_bbase = NULL; /* kernel logical address of the * - * buffer region */ + u32 dt3155_dev_open[MAXBOARDS] = {0 #if MAXBOARDS == 2 , 0 @@ -139,11 +137,11 @@ static void quick_stop (int minor) { // TODO: scott was here #if 1 - ReadMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + int_csr_r.reg = readl(dt3155_lbase[minor] + INT_CSR); /* disable interrupts */ int_csr_r.fld.FLD_END_EVE_EN = 0; int_csr_r.fld.FLD_END_ODD_EN = 0; - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, dt3155_lbase[minor] + INT_CSR); dt3155_status[minor].state &= ~(DT3155_STATE_STOP|0xff); /* mark the system stopped: */ @@ -171,6 +169,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) int index; unsigned long flags; u32 buffer_addr; + void __iomem *mmio; /* find out who issued the interrupt */ for (index = 0; index < ndevices; index++) { @@ -187,8 +186,10 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) return; } + mmio = dt3155_lbase[minor]; + /* Check for corruption and set a flag if so */ - ReadMReg((dt3155_lbase[minor] + CSR1), csr1_r.reg); + csr1_r.reg = readl(mmio + CSR1); if ((csr1_r.fld.FLD_CRPT_EVE) || (csr1_r.fld.FLD_CRPT_ODD)) { @@ -200,7 +201,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) return; } - ReadMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + int_csr_r.reg = readl(mmio + INT_CSR); /* Handle the even field ... */ if (int_csr_r.fld.FLD_END_EVE) @@ -211,7 +212,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) dt3155_fbuffer[minor]->frame_count++; } - ReadI2C(dt3155_lbase[minor], EVEN_CSR, &i2c_even_csr.reg); + ReadI2C(mmio, EVEN_CSR, &i2c_even_csr.reg); /* Clear the interrupt? */ int_csr_r.fld.FLD_END_EVE = 1; @@ -231,7 +232,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) } } - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, mmio + INT_CSR); /* Set up next DMA if we are doing FIELDS */ if ((dt3155_status[minor].state & DT3155_STATE_MODE) == @@ -249,7 +250,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* Set up the DMA address for the next field */ local_irq_restore(flags); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), buffer_addr); + writel(buffer_addr, mmio + ODD_DMA_START); } /* Check for errors. */ @@ -257,7 +258,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) if (i2c_even_csr.fld.ERROR_EVE) dt3155_errno = DT_ERR_OVERRUN; - WriteI2C(dt3155_lbase[minor], EVEN_CSR, i2c_even_csr.reg); + WriteI2C(mmio, EVEN_CSR, i2c_even_csr.reg); /* Note that we actually saw an even field meaning */ /* that subsequent odd field complete the frame */ @@ -274,7 +275,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* ... now handle the odd field */ if (int_csr_r.fld.FLD_END_ODD) { - ReadI2C(dt3155_lbase[minor], ODD_CSR, &i2c_odd_csr.reg); + ReadI2C(mmio, ODD_CSR, &i2c_odd_csr.reg); /* Clear the interrupt? */ int_csr_r.fld.FLD_END_ODD = 1; @@ -310,7 +311,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) } } - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, mmio + INT_CSR); /* if the odd field has been acquired, then */ /* change the next dma location for both fields */ @@ -387,14 +388,14 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) if ((dt3155_status[minor].state & DT3155_STATE_MODE) == DT3155_STATE_FLD) { - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), buffer_addr); + writel(buffer_addr, mmio + EVEN_DMA_START); } else { - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), buffer_addr); + writel(buffer_addr, mmio + EVEN_DMA_START); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), buffer_addr - + dt3155_status[minor].config.cols); + writel(buffer_addr + dt3155_status[minor].config.cols, + mmio + ODD_DMA_START); } /* Do error checking */ @@ -402,7 +403,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) if (i2c_odd_csr.fld.ERROR_ODD) dt3155_errno = DT_ERR_OVERRUN; - WriteI2C(dt3155_lbase[minor], ODD_CSR, i2c_odd_csr.reg); + WriteI2C(mmio, ODD_CSR, i2c_odd_csr.reg); return; } @@ -419,6 +420,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) static void dt3155_init_isr(int minor) { const u32 stride = dt3155_status[minor].config.cols; + void __iomem *mmio = dt3155_lbase[minor]; switch (dt3155_status[minor].state & DT3155_STATE_MODE) { @@ -429,12 +431,9 @@ static void dt3155_init_isr(int minor) even_dma_stride_r = 0; odd_dma_stride_r = 0; - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), - even_dma_start_r); - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_STRIDE), - even_dma_stride_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_STRIDE), - odd_dma_stride_r); + writel(even_dma_start_r, mmio + EVEN_DMA_START); + writel(even_dma_stride_r, mmio + EVEN_DMA_STRIDE); + writel(odd_dma_stride_r, mmio + ODD_DMA_STRIDE); break; } @@ -447,14 +446,10 @@ static void dt3155_init_isr(int minor) even_dma_stride_r = stride; odd_dma_stride_r = stride; - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), - even_dma_start_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), - odd_dma_start_r); - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_STRIDE), - even_dma_stride_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_STRIDE), - odd_dma_stride_r); + writel(even_dma_start_r, mmio + EVEN_DMA_START); + writel(odd_dma_start_r, mmio + ODD_DMA_START); + writel(even_dma_stride_r, mmio + EVEN_DMA_STRIDE); + writel(odd_dma_stride_r, mmio + ODD_DMA_STRIDE); break; } } @@ -462,9 +457,9 @@ static void dt3155_init_isr(int minor) /* 50/60 Hz should be set before this point but let's make sure it is */ /* right anyway */ - ReadI2C(dt3155_lbase[minor], CSR2, &i2c_csr2.reg); + ReadI2C(mmio, CSR2, &i2c_csr2.reg); i2c_csr2.fld.HZ50 = FORMAT50HZ; - WriteI2C(dt3155_lbase[minor], CSR2, i2c_csr2.reg); + WriteI2C(mmio, CSR2, i2c_csr2.reg); /* enable busmaster chip, clear flags */ @@ -484,7 +479,7 @@ static void dt3155_init_isr(int minor) csr1_r.fld.FLD_CRPT_EVE = 1; /* writing a 1 clears flags */ csr1_r.fld.FLD_CRPT_ODD = 1; - WriteMReg((dt3155_lbase[minor] + CSR1),csr1_r.reg); + writel(csr1_r.reg, mmio + CSR1); /* Enable interrupts at the end of each field */ @@ -493,14 +488,14 @@ static void dt3155_init_isr(int minor) int_csr_r.fld.FLD_END_ODD_EN = 1; int_csr_r.fld.FLD_START_EN = 0; - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, mmio + INT_CSR); /* start internal BUSY bits */ - ReadI2C(dt3155_lbase[minor], CSR2, &i2c_csr2.reg); + ReadI2C(mmio, CSR2, &i2c_csr2.reg); i2c_csr2.fld.BUSY_ODD = 1; i2c_csr2.fld.BUSY_EVE = 1; - WriteI2C(dt3155_lbase[minor], CSR2, i2c_csr2.reg); + WriteI2C(mmio, CSR2, i2c_csr2.reg); /* Now its up to the interrupt routine!! */ @@ -709,7 +704,7 @@ static int dt3155_open(struct inode* inode, struct file* filep) /* Disable ALL interrupts */ int_csr_r.reg = 0; - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, dt3155_lbase[minor] + INT_CSR); init_waitqueue_head(&(dt3155_read_wait_queue[minor])); @@ -911,7 +906,7 @@ static int find_PCI (void) /* Remap the base address to a logical address through which we * can access it. */ - dt3155_lbase[pci_index - 1] = ioremap(base,PCI_PAGE_SIZE); + dt3155_lbase[pci_index - 1] = ioremap(base, PCI_PAGE_SIZE); dt3155_status[pci_index - 1].reg_addr = base; DT_3155_DEBUG_MSG("DT3155: New logical address is %p \n", dt3155_lbase[pci_index-1]); @@ -1036,7 +1031,7 @@ int init_module(void) int_csr_r.reg = 0; for( index = 0; index < ndevices; index++) { - WriteMReg((dt3155_lbase[index] + INT_CSR), int_csr_r.reg); + writel(int_csr_r.reg, dt3155_lbase[index] + INT_CSR); if(dt3155_status[index].device_installed) { /* diff --git a/drivers/staging/dt3155/dt3155_drv.h b/drivers/staging/dt3155/dt3155_drv.h index 95e68c3..c447c61 100644 --- a/drivers/staging/dt3155/dt3155_drv.h +++ b/drivers/staging/dt3155/dt3155_drv.h @@ -24,12 +24,6 @@ MA 02111-1307 USA #ifndef DT3155_DRV_INC #define DT3155_DRV_INC -/* kernel logical address of the frame grabbers */ -extern u8 *dt3155_lbase[MAXBOARDS]; - -/* kernel logical address of ram buffer */ -extern u8 *dt3155_bbase; - #ifdef __KERNEL__ #include <linux/wait.h> diff --git a/drivers/staging/dt3155/dt3155_io.c b/drivers/staging/dt3155/dt3155_io.c index 7792e71..485cc5e 100644 --- a/drivers/staging/dt3155/dt3155_io.c +++ b/drivers/staging/dt3155/dt3155_io.c @@ -21,6 +21,8 @@ */ #include <linux/delay.h> +#include <linux/io.h> + #include "dt3155.h" #include "dt3155_io.h" #include "dt3155_drv.h" @@ -75,13 +77,13 @@ u8 i2c_pm_lut_data; * * This function handles read/write timing and r/w timeout error */ -static int wait_ibsyclr(u8 *lpReg) +static int wait_ibsyclr(void __iomem *mmio) { /* wait 100 microseconds */ udelay(100L); /* __delay(loops_per_sec/10000); */ - ReadMReg(lpReg + IIC_CSR2, iic_csr2_r.reg); + iic_csr2_r.reg = readl(mmio + IIC_CSR2); if (iic_csr2_r.fld.NEW_CYCLE) { /* if NEW_CYCLE didn't clear */ /* TIMEOUT ERROR */ @@ -101,11 +103,11 @@ static int wait_ibsyclr(u8 *lpReg) * 2nd parameter is reg. index; * 3rd is value to be written */ -int WriteI2C(u8 *lpReg, u_short wIregIndex, u8 byVal) +int WriteI2C(void __iomem *mmio, u_short wIregIndex, u8 byVal) { /* read 32 bit IIC_CSR2 register data into union */ - ReadMReg((lpReg + IIC_CSR2), iic_csr2_r.reg); + iic_csr2_r.reg = readl(mmio + IIC_CSR2); /* for write operation */ iic_csr2_r.fld.DIR_RD = 0; @@ -117,10 +119,10 @@ int WriteI2C(u8 *lpReg, u_short wIregIndex, u8 byVal) iic_csr2_r.fld.NEW_CYCLE = 1; /* xfer union data into 32 bit IIC_CSR2 register */ - WriteMReg((lpReg + IIC_CSR2), iic_csr2_r.reg); + writel(iic_csr2_r.reg, mmio + IIC_CSR2); /* wait for IIC cycle to finish */ - return wait_ibsyclr(lpReg); + return wait_ibsyclr(mmio); } /* @@ -132,12 +134,12 @@ int WriteI2C(u8 *lpReg, u_short wIregIndex, u8 byVal) * 2nd parameter is reg. index; * 3rd is adrs of value to be read */ -int ReadI2C(u8 *lpReg, u_short wIregIndex, u8 *byVal) +int ReadI2C(void __iomem *mmio, u_short wIregIndex, u8 *byVal) { int writestat; /* status for return */ /* read 32 bit IIC_CSR2 register data into union */ - ReadMReg((lpReg + IIC_CSR2), iic_csr2_r.reg); + iic_csr2_r.reg = readl(mmio + IIC_CSR2); /* for read operation */ iic_csr2_r.fld.DIR_RD = 1; @@ -149,14 +151,14 @@ int ReadI2C(u8 *lpReg, u_short wIregIndex, u8 *byVal) iic_csr2_r.fld.NEW_CYCLE = 1; /* xfer union's data into 32 bit IIC_CSR2 register */ - WriteMReg((lpReg + IIC_CSR2), iic_csr2_r.reg); + writel(iic_csr2_r.reg, mmio + IIC_CSR2); /* wait for IIC cycle to finish */ - writestat = wait_ibsyclr(lpReg); + writestat = wait_ibsyclr(mmio); /* Next 2 commands read 32 bit IIC_CSR1 register's data into union */ /* first read data is in IIC_CSR1 */ - ReadMReg((lpReg + IIC_CSR1), iic_csr1_r.reg); + iic_csr1_r.reg = readl(mmio + IIC_CSR1); /* now get data u8 out of register */ *byVal = (u8) iic_csr1_r.fld.RD_DATA; diff --git a/drivers/staging/dt3155/dt3155_io.h b/drivers/staging/dt3155/dt3155_io.h index d1a2510..a9aa754 100644 --- a/drivers/staging/dt3155/dt3155_io.h +++ b/drivers/staging/dt3155/dt3155_io.h @@ -34,11 +34,6 @@ MA 02111-1307 USA #ifndef DT3155_IO_INC #define DT3155_IO_INC -/* macros to access registers */ - -#define WriteMReg(Address, Data) (*((u32 *)(Address)) = Data) -#define ReadMReg(Address, Data) (Data = *((u32 *)(Address))) - /***************** 32 bit register globals **************/ /* offsets for 32-bit memory mapped registers */ @@ -352,7 +347,7 @@ extern u8 i2c_pm_lut_data; /* access 8-bit IIC registers */ -extern int ReadI2C(u8 *lpReg, u_short wIregIndex, u8 *byVal); -extern int WriteI2C(u8 *lpReg, u_short wIregIndex, u8 byVal); +extern int ReadI2C(void __iomem *mmio, u_short wIregIndex, u8 *byVal); +extern int WriteI2C(void __iomem *mmio, u_short wIregIndex, u8 byVal); #endif |