From a36ef6b1e09d06d4f1ac769eee4bd7e6cf3e0fae Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 22 Jun 2008 14:19:19 -0300 Subject: [PATCH] V4L/DVB (8128): saa7146: ->cpu_addr and friends are little-endian Annotations + stop saa7146_i2c from playing fast and loose with reuse of ->cpu_addr for host-endian. Signed-off-by: Al Viro Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/saa7146_core.c | 4 ++-- drivers/media/common/saa7146_hlp.c | 2 +- drivers/media/common/saa7146_i2c.c | 34 ++++++++++++++-------------- drivers/media/common/saa7146_video.c | 4 ++-- include/media/saa7146.h | 4 ++-- 5 files changed, 24 insertions(+), 24 deletions(-) diff --git a/drivers/media/common/saa7146_core.c b/drivers/media/common/saa7146_core.c index 89c7660b85..d01965e969 100644 --- a/drivers/media/common/saa7146_core.c +++ b/drivers/media/common/saa7146_core.c @@ -233,7 +233,7 @@ void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt) int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) { - u32 *cpu; + __le32 *cpu; dma_addr_t dma_addr; cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr); @@ -250,7 +250,7 @@ int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, struct scatterlist *list, int sglen ) { - u32 *ptr, fill; + __le32 *ptr, fill; int nr_pages = 0; int i,p; diff --git a/drivers/media/common/saa7146_hlp.c b/drivers/media/common/saa7146_hlp.c index 9c905399a2..05bde9ccb7 100644 --- a/drivers/media/common/saa7146_hlp.c +++ b/drivers/media/common/saa7146_hlp.c @@ -338,7 +338,7 @@ static void calculate_clipping_registers_rect(struct saa7146_dev *dev, struct sa struct saa7146_video_dma *vdma2, u32* clip_format, u32* arbtr_ctrl, enum v4l2_field field) { struct saa7146_vv *vv = dev->vv_data; - u32 *clipping = vv->d_clipping.cpu_addr; + __le32 *clipping = vv->d_clipping.cpu_addr; int width = fh->ov.win.w.width; int height = fh->ov.win.w.height; diff --git a/drivers/media/common/saa7146_i2c.c b/drivers/media/common/saa7146_i2c.c index 35b01ec40a..c11da4d09c 100644 --- a/drivers/media/common/saa7146_i2c.c +++ b/drivers/media/common/saa7146_i2c.c @@ -24,7 +24,7 @@ static inline u32 saa7146_i2c_status(struct saa7146_dev *dev) sent through the saa7146. have a look at the specifications p. 122 ff to understand this. it returns the number of u32s to send, or -1 in case of an error. */ -static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op) +static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, __le32 *op) { int h1, h2; int i, j, addr; @@ -47,7 +47,7 @@ static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op) } /* be careful: clear out the i2c-mem first */ - memset(op,0,sizeof(u32)*mem); + memset(op,0,sizeof(__le32)*mem); /* loop through all messages */ for(i = 0; i < num; i++) { @@ -57,16 +57,16 @@ static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op) so we have to perform a translation */ addr = (m[i].addr*2) + ( (0 != (m[i].flags & I2C_M_RD)) ? 1 : 0); h1 = op_count/3; h2 = op_count%3; - op[h1] |= ( (u8)addr << ((3-h2)*8)); - op[h1] |= (SAA7146_I2C_START << ((3-h2)*2)); + op[h1] |= cpu_to_le32( (u8)addr << ((3-h2)*8)); + op[h1] |= cpu_to_le32(SAA7146_I2C_START << ((3-h2)*2)); op_count++; /* loop through all bytes of message i */ for(j = 0; j < m[i].len; j++) { /* insert the data bytes */ h1 = op_count/3; h2 = op_count%3; - op[h1] |= ( (u32)((u8)m[i].buf[j]) << ((3-h2)*8)); - op[h1] |= ( SAA7146_I2C_CONT << ((3-h2)*2)); + op[h1] |= cpu_to_le32( (u32)((u8)m[i].buf[j]) << ((3-h2)*8)); + op[h1] |= cpu_to_le32( SAA7146_I2C_CONT << ((3-h2)*2)); op_count++; } @@ -75,9 +75,9 @@ static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op) /* have a look at the last byte inserted: if it was: ...CONT change it to ...STOP */ h1 = (op_count-1)/3; h2 = (op_count-1)%3; - if ( SAA7146_I2C_CONT == (0x3 & (op[h1] >> ((3-h2)*2))) ) { - op[h1] &= ~(0x2 << ((3-h2)*2)); - op[h1] |= (SAA7146_I2C_STOP << ((3-h2)*2)); + if ( SAA7146_I2C_CONT == (0x3 & (le32_to_cpu(op[h1]) >> ((3-h2)*2))) ) { + op[h1] &= ~cpu_to_le32(0x2 << ((3-h2)*2)); + op[h1] |= cpu_to_le32(SAA7146_I2C_STOP << ((3-h2)*2)); } /* return the number of u32s to send */ @@ -88,7 +88,7 @@ static int saa7146_i2c_msg_prepare(const struct i2c_msg *m, int num, u32 *op) which bytes were read through the adapter and write them back to the corresponding i2c-message. but instead, we simply write back all bytes. fixme: this could be improved. */ -static int saa7146_i2c_msg_cleanup(const struct i2c_msg *m, int num, u32 *op) +static int saa7146_i2c_msg_cleanup(const struct i2c_msg *m, int num, __le32 *op) { int i, j; int op_count = 0; @@ -101,7 +101,7 @@ static int saa7146_i2c_msg_cleanup(const struct i2c_msg *m, int num, u32 *op) /* loop throgh all bytes of message i */ for(j = 0; j < m[i].len; j++) { /* write back all bytes that could have been read */ - m[i].buf[j] = (op[op_count/3] >> ((3-(op_count%3))*8)); + m[i].buf[j] = (le32_to_cpu(op[op_count/3]) >> ((3-(op_count%3))*8)); op_count++; } } @@ -174,7 +174,7 @@ static int saa7146_i2c_reset(struct saa7146_dev *dev) /* this functions writes out the data-byte 'dword' to the i2c-device. it returns 0 if ok, -1 if the transfer failed, -2 if the transfer failed badly (e.g. address error) */ -static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_delay) +static int saa7146_i2c_writeout(struct saa7146_dev *dev, __le32 *dword, int short_delay) { u32 status = 0, mc2 = 0; int trial = 0; @@ -186,7 +186,7 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d if( 0 != (SAA7146_USE_I2C_IRQ & dev->ext->flags)) { saa7146_write(dev, I2C_STATUS, dev->i2c_bitrate); - saa7146_write(dev, I2C_TRANSFER, *dword); + saa7146_write(dev, I2C_TRANSFER, le32_to_cpu(*dword)); dev->i2c_op = 1; SAA7146_ISR_CLEAR(dev, MASK_16|MASK_17); @@ -209,7 +209,7 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d status = saa7146_read(dev, I2C_STATUS); } else { saa7146_write(dev, I2C_STATUS, dev->i2c_bitrate); - saa7146_write(dev, I2C_TRANSFER, *dword); + saa7146_write(dev, I2C_TRANSFER, le32_to_cpu(*dword)); saa7146_write(dev, MC2, (MASK_00 | MASK_16)); /* do not poll for i2c-status before upload is complete */ @@ -282,7 +282,7 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d } /* read back data, just in case we were reading ... */ - *dword = saa7146_read(dev, I2C_TRANSFER); + *dword = cpu_to_le32(saa7146_read(dev, I2C_TRANSFER)); DEB_I2C(("after: 0x%08x\n",*dword)); return 0; @@ -291,7 +291,7 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d static int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg *msgs, int num, int retries) { int i = 0, count = 0; - u32* buffer = dev->d_i2c.cpu_addr; + __le32 *buffer = dev->d_i2c.cpu_addr; int err = 0; int address_err = 0; int short_delay = 0; @@ -376,7 +376,7 @@ out: /* another bug in revision 0: the i2c-registers get uploaded randomly by other uploads, so we better clear them out before continueing */ if( 0 == dev->revision ) { - u32 zero = 0; + __le32 zero = 0; saa7146_i2c_reset(dev); if( 0 != saa7146_i2c_writeout(dev, &zero, short_delay)) { INFO(("revision 0 error. this should never happen.\n")); diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c index 3cbc6ebbe6..a5e62750ee 100644 --- a/drivers/media/common/saa7146_video.c +++ b/drivers/media/common/saa7146_video.c @@ -605,8 +605,8 @@ static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *bu struct saa7146_pgtable *pt1 = &buf->pt[0]; struct saa7146_pgtable *pt2 = &buf->pt[1]; struct saa7146_pgtable *pt3 = &buf->pt[2]; - u32 *ptr1, *ptr2, *ptr3; - u32 fill; + __le32 *ptr1, *ptr2, *ptr3; + __le32 fill; int size = buf->fmt->width*buf->fmt->height; int i,p,m1,m2,m3,o1,o2; diff --git a/include/media/saa7146.h b/include/media/saa7146.h index 88b2b5a619..2f68f4cd00 100644 --- a/include/media/saa7146.h +++ b/include/media/saa7146.h @@ -53,7 +53,7 @@ struct saa7146_vv; /* saa7146 page table */ struct saa7146_pgtable { unsigned int size; - u32 *cpu; + __le32 *cpu; dma_addr_t dma; /* used for offsets for u,v planes for planar capture modes */ unsigned long offset; @@ -101,7 +101,7 @@ struct saa7146_extension struct saa7146_dma { dma_addr_t dma_handle; - u32 *cpu_addr; + __le32 *cpu_addr; }; struct saa7146_dev -- 2.39.5