diff options
Diffstat (limited to 'drivers/media/video/mxc/capture/mx27_prphw.c')
| -rw-r--r-- | drivers/media/video/mxc/capture/mx27_prphw.c | 1099 |
1 files changed, 1099 insertions, 0 deletions
diff --git a/drivers/media/video/mxc/capture/mx27_prphw.c b/drivers/media/video/mxc/capture/mx27_prphw.c new file mode 100644 index 000000000000..c56a6df1716e --- /dev/null +++ b/drivers/media/video/mxc/capture/mx27_prphw.c @@ -0,0 +1,1099 @@ +/* + * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file mx27_prphw.c + * + * @brief MX27 Video For Linux 2 capture driver + * + * @ingroup MXC_V4L2_CAPTURE + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/clk.h> +#include <asm/io.h> +#include <linux/delay.h> + +#include "mx27_prp.h" + +#define PRP_MIN_IN_WIDTH 32 +#define PRP_MAX_IN_WIDTH 2044 +#define PRP_MIN_IN_HEIGHT 32 +#define PRP_MAX_IN_HEIGHT 2044 + +typedef struct _coeff_t { + unsigned long coeff[2]; + unsigned long cntl; +} coeff_t[2][2]; + +static coeff_t *PRP_RSZ_COEFF = (coeff_t *) PRP_CH1_RZ_HORI_COEF1; + +static unsigned char scale_get(scale_t * t, + unsigned char *i, unsigned char *out); +static int gcd(int x, int y); +static int ratio(int x, int y, int *den); +static int prp_scale_bilinear(scale_t * t, int coeff, int base, int nxt); +static int prp_scale_ave(scale_t * t, unsigned char base); +static int ave_scale(scale_t * t, int inv, int outv); +static int scale(scale_t * t, int inv, int outv); + +/*! + * @param t table + * @param i table index + * @param out bilinear # input pixels to advance + * average whether result is ready for output + * @return coefficient +*/ +static unsigned char scale_get(scale_t * t, unsigned char *i, + unsigned char *out) +{ + unsigned char c; + + c = t->tbl[*i]; + (*i)++; + *i %= t->len; + + if (out) { + if (t->algo == ALGO_BIL) { + for ((*out) = 1; + (*i) && ((*i) < t->len) && !t->tbl[(*i)]; (*i)++) { + (*out)++; + } + if ((*i) == t->len) + (*i) = 0; + } else + *out = c >> BC_COEF; + } + + c &= SZ_COEF - 1; + + if (c == SZ_COEF - 1) + c = SZ_COEF; + + return c; +} + +/*! + * @brief Get maximum common divisor. + * @param x First input value + * @param y Second input value + * @return Maximum common divisor of x and y + */ +static int gcd(int x, int y) +{ + int k; + + if (x < y) { + k = x; + x = y; + y = k; + } + + while ((k = x % y)) { + x = y; + y = k; + } + + return y; +} + +/*! + * @brief Get ratio. + * @param x First input value + * @param y Second input value + * @param den Denominator of the ratio (corresponding to y) + * @return Numerator of the ratio (corresponding to x) + */ +static int ratio(int x, int y, int *den) +{ + int g; + + if (!x || !y) + return 0; + + g = gcd(x, y); + *den = y / g; + + return x / g; +} + +/*! + * @brief Build PrP coefficient entry based on bilinear algorithm + * + * @param t The pointer to scale_t structure + * @param coeff The weighting coefficient + * @param base The base of the coefficient + * @param nxt Number of pixels to be read + * + * @return The length of current coefficient table on success + * -1 on failure + */ +static int prp_scale_bilinear(scale_t * t, int coeff, int base, int nxt) +{ + int i; + + if (t->len >= sizeof(t->tbl)) + return -1; + + coeff = ((coeff << BC_COEF) + (base >> 1)) / base; + if (coeff >= SZ_COEF - 1) + coeff--; + + coeff |= SZ_COEF; + t->tbl[(int)t->len++] = (unsigned char)coeff; + + for (i = 1; i < nxt; i++) { + if (t->len >= MAX_TBL) + return -1; + + t->tbl[(int)t->len++] = 0; + } + + return t->len; +} + +#define _bary(name) static const unsigned char name[] + +_bary(c1) = { +7}; + +_bary(c2) = { +4, 4}; + +_bary(c3) = { +2, 4, 2}; + +_bary(c4) = { +2, 2, 2, 2}; + +_bary(c5) = { +1, 2, 2, 2, 1}; + +_bary(c6) = { +1, 1, 2, 2, 1, 1}; + +_bary(c7) = { +1, 1, 1, 2, 1, 1, 1}; + +_bary(c8) = { +1, 1, 1, 1, 1, 1, 1, 1}; + +_bary(c9) = { +1, 1, 1, 1, 1, 1, 1, 1, 0}; + +_bary(c10) = { +0, 1, 1, 1, 1, 1, 1, 1, 1, 0}; + +_bary(c11) = { +0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0}; + +_bary(c12) = { +0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0}; + +_bary(c13) = { +0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0}; + +_bary(c14) = { +0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0}; + +_bary(c15) = { +0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0}; + +_bary(c16) = { +1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0}; + +_bary(c17) = { +0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0}; + +_bary(c18) = { +0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0}; + +_bary(c19) = { +0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0}; + +_bary(c20) = { +0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0}; + +static const unsigned char *ave_coeff[] = { + c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, + c11, c12, c13, c14, c15, c16, c17, c18, c19, c20 +}; + +/*! + * @brief Build PrP coefficient table based on average algorithm + * + * @param t The pointer to scale_t structure + * @param base The base of the coefficient + * + * @return The length of current coefficient table on success + * -1 on failure + */ +static int prp_scale_ave(scale_t * t, unsigned char base) +{ + if (t->len + base > sizeof(t->tbl)) + return -1; + + memcpy(&t->tbl[(int)t->len], ave_coeff[(int)base - 1], base); + t->len = (unsigned char)(t->len + base); + t->tbl[t->len - 1] |= SZ_COEF; + + return t->len; +} + +/*! + * @brief Build PrP coefficient table based on average algorithm + * + * @param t The pointer to scale_t structure + * @param inv Input resolution + * @param outv Output resolution + * + * @return The length of current coefficient table on success + * -1 on failure + */ +static int ave_scale(scale_t * t, int inv, int outv) +{ + int ratio_count; + + ratio_count = 0; + if (outv != 1) { + unsigned char a[20]; + int v; + + /* split n:m into multiple n[i]:1 */ + for (v = 0; v < outv; v++) + a[v] = (unsigned char)(inv / outv); + + inv %= outv; + if (inv) { + /* find start of next layer */ + v = (outv - inv) >> 1; + inv += v; + for (; v < inv; v++) + a[v]++; + } + + for (v = 0; v < outv; v++) { + if (prp_scale_ave(t, a[v]) < 0) + return -1; + + t->ratio[ratio_count] = a[v]; + ratio_count++; + } + } else if (prp_scale_ave(t, inv) < 0) { + return -1; + } else { + t->ratio[ratio_count++] = (char)inv; + ratio_count++; + } + + return t->len; +} + +/*! + * @brief Build PrP coefficient table + * + * @param t The pointer to scale_t structure + * @param inv input resolution reduced ratio + * @param outv output resolution reduced ratio + * + * @return The length of current coefficient table on success + * -1 on failure + */ +static int scale(scale_t * t, int inv, int outv) +{ + int v; /* overflow counter */ + int coeff, nxt; /* table output */ + + t->len = 0; + if (t->algo == ALGO_AUTO) { + /* automatic choice - bilinear for shrinking less than 2:1 */ + t->algo = ((outv != inv) && ((2 * outv) > inv)) ? + ALGO_BIL : ALGO_AVG; + } + + /* 1:1 resize must use averaging, bilinear will hang */ + if ((inv == outv) && (t->algo == ALGO_BIL)) { + pr_debug("Warning: 1:1 resize must use averaging algo\n"); + t->algo = ALGO_AVG; + } + + memset(t->tbl, 0, sizeof(t->tbl)); + if (t->algo == ALGO_BIL) { + t->ratio[0] = (char)inv; + t->ratio[1] = (char)outv; + } else + memset(t->ratio, 0, sizeof(t->ratio)); + + if (inv == outv) { + /* force scaling */ + t->ratio[0] = 1; + if (t->algo == ALGO_BIL) + t->ratio[1] = 1; + + return prp_scale_ave(t, 1); + } + + if (inv < outv) { + pr_debug("Upscaling not supported %d:%d\n", inv, outv); + return -1; + } + + if (t->algo != ALGO_BIL) + return ave_scale(t, inv, outv); + + v = 0; + if (inv >= 2 * outv) { + /* downscale: >=2:1 bilinear approximation */ + coeff = inv - 2 * outv; + v = 0; + nxt = 0; + do { + v += coeff; + nxt = 2; + while (v >= outv) { + v -= outv; + nxt++; + } + + if (prp_scale_bilinear(t, 1, 2, nxt) < 0) + return -1; + } while (v); + } else { + /* downscale: bilinear */ + int in_pos_inc = 2 * outv; + int out_pos = inv; + int out_pos_inc = 2 * inv; + int init_carry = inv - outv; + int carry = init_carry; + + v = outv + in_pos_inc; + do { + coeff = v - out_pos; + out_pos += out_pos_inc; + carry += out_pos_inc; + for (nxt = 0; v < out_pos; nxt++) { + v += in_pos_inc; + carry -= in_pos_inc; + } + if (prp_scale_bilinear(t, coeff, in_pos_inc, nxt) < 0) + return -1; + } while (carry != init_carry); + } + return t->len; +} + +/*! + * @brief Build PrP coefficient table + * + * @param pscale The pointer to scale_t structure which holdes + * coefficient tables + * @param din Scale ratio numerator + * @param dout Scale ratio denominator + * @param inv Input resolution + * @param vout Output resolution + * @param pout Internal output resolution + * @param retry Retry times (round the output length) when need + * + * @return Zero on success, others on failure + */ +int prp_scale(scale_t * pscale, int din, int dout, int inv, + unsigned short *vout, unsigned short *pout, int retry) +{ + int num; + int den; + unsigned short outv; + + /* auto-generation of values */ + if (!(dout && din)) { + if (!*vout) + dout = din = 1; + else { + din = inv; + dout = *vout; + } + } + + if (din < dout) { + pr_debug("Scale err, unsupported ratio %d : %d\n", din, dout); + return -1; + } + + lp_retry: + num = ratio(din, dout, &den); + if (!num) { + pr_debug("Scale err, unsupported ratio %d : %d\n", din, dout); + return -1; + } + + if (num > MAX_TBL || scale(pscale, num, den) < 0) { + dout++; + if (retry--) + goto lp_retry; + + pr_debug("Scale err, unsupported ratio %d : %d\n", num, den); + return -1; + } + + if (pscale->algo == ALGO_BIL) { + unsigned char i, j, k; + + outv = + (unsigned short)(inv / pscale->ratio[0] * pscale->ratio[1]); + inv %= pscale->ratio[0]; + for (i = j = 0; inv > 0; j++) { + unsigned char nxt; + + k = scale_get(pscale, &i, &nxt); + if (inv == 1 && k < SZ_COEF) { + /* needs 2 pixels for this output */ + break; + } + inv -= nxt; + } + outv = outv + j; + } else { + unsigned char i, tot; + + for (tot = i = 0; pscale->ratio[i]; i++) + tot = tot + pscale->ratio[i]; + + outv = (unsigned short)(inv / tot) * i; + inv %= tot; + for (i = 0; inv > 0; i++, outv++) + inv -= pscale->ratio[i]; + } + + if (!(*vout) || ((*vout) > outv)) + *vout = outv; + + if (pout) + *pout = outv; + + return 0; +} + +/*! + * @brief Reset PrP block + */ +int prphw_reset(void) +{ + unsigned long val; + unsigned long flag; + int i; + + flag = PRP_CNTL_RST; + val = PRP_CNTL_RSTVAL; + + __raw_writel(flag, PRP_CNTL); + + /* timeout */ + for (i = 0; i < 1000; i++) { + if (!(__raw_readl(PRP_CNTL) & flag)) { + pr_debug("PrP reset over\n"); + break; + } + msleep(1); + } + + /* verify reset value */ + if (__raw_readl(PRP_CNTL) != val) { + pr_info("PrP reset err, val = 0x%08X\n", __raw_readl(PRP_CNTL)); + return -1; + } + + return 0; +} + +/*! + * @brief Enable PrP channel. + * @param channel Channel number to be enabled + * @return Zero on success, others on failure + */ +int prphw_enable(int channel) +{ + unsigned long val; + + val = __raw_readl(PRP_CNTL); + if (channel & PRP_CHANNEL_1) + val |= PRP_CNTL_CH1EN; + if (channel & PRP_CHANNEL_2) + val |= (PRP_CNTL_CH2EN | PRP_CNTL_CH2_FLOWEN); + + __raw_writel(val, PRP_CNTL); + + return 0; +} + +/*! + * @brief Disable PrP channel. + * @param channel Channel number to be disable + * @return Zero on success, others on failure + */ +int prphw_disable(int channel) +{ + unsigned long val; + + val = __raw_readl(PRP_CNTL); + if (channel & PRP_CHANNEL_1) + val &= ~PRP_CNTL_CH1EN; + if (channel & PRP_CHANNEL_2) + val &= ~(PRP_CNTL_CH2EN | PRP_CNTL_CH2_FLOWEN); + + __raw_writel(val, PRP_CNTL); + + return 0; +} + +/*! + * @brief Set PrP input buffer address. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_inptr(emma_prp_cfg * cfg) +{ + if (cfg->in_csi & PRP_CSI_EN) + return -1; + + __raw_writel(cfg->in_ptr, PRP_SOURCE_Y_PTR); + if (cfg->in_pix == PRP_PIXIN_YUV420) { + u32 size; + + size = cfg->in_line_stride * cfg->in_height; + __raw_writel(cfg->in_ptr + size, PRP_SOURCE_CB_PTR); + __raw_writel(cfg->in_ptr + size + (size >> 2), + PRP_SOURCE_CR_PTR); + } + return 0; +} + +/*! + * @brief Set PrP channel 1 output buffer 1 address. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_ch1ptr(emma_prp_cfg * cfg) +{ + if (cfg->ch1_pix == PRP_PIX1_UNUSED) + return -1; + + __raw_writel(cfg->ch1_ptr, PRP_DEST_RGB1_PTR); + + /* support double buffer in loop mode only */ + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) { + if (cfg->ch1_ptr2) + __raw_writel(cfg->ch1_ptr2, PRP_DEST_RGB2_PTR); + else + __raw_writel(cfg->ch1_ptr, PRP_DEST_RGB2_PTR); + } + + return 0; +} + +/*! + * @brief Set PrP channel 1 output buffer 2 address. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_ch1ptr2(emma_prp_cfg * cfg) +{ + if (cfg->ch1_pix == PRP_PIX1_UNUSED || + (cfg->in_csi & PRP_CSI_LOOP) != PRP_CSI_LOOP) + return -1; + + if (cfg->ch1_ptr2) + __raw_writel(cfg->ch1_ptr2, PRP_DEST_RGB2_PTR); + else + return -1; + + return 0; +} + +/*! + * @brief Set PrP channel 2 output buffer 1 address. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_ch2ptr(emma_prp_cfg * cfg) +{ + u32 size; + + if (cfg->ch2_pix == PRP_PIX2_UNUSED) + return -1; + + __raw_writel(cfg->ch2_ptr, PRP_DEST_Y_PTR); + + if (cfg->ch2_pix == PRP_PIX2_YUV420) { + size = cfg->ch2_width * cfg->ch2_height; + __raw_writel(cfg->ch2_ptr + size, PRP_DEST_CB_PTR); + __raw_writel(cfg->ch2_ptr + size + (size >> 2), + PRP_DEST_CR_PTR); + } + + __raw_writel(__raw_readl(PRP_CNTL) | PRP_CNTL_CH2B1, PRP_CNTL); + return 0; +} + +/*! + * @brief Set PrP channel 2 output buffer 2 address. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_ch2ptr2(emma_prp_cfg * cfg) +{ + u32 size; + + if (cfg->ch2_pix == PRP_PIX2_UNUSED || + (cfg->in_csi & PRP_CSI_LOOP) != PRP_CSI_LOOP) + return -1; + + __raw_writel(cfg->ch2_ptr2, PRP_SOURCE_Y_PTR); + if (cfg->ch2_pix == PRP_PIX2_YUV420) { + size = cfg->ch2_width * cfg->ch2_height; + __raw_writel(cfg->ch2_ptr2 + size, PRP_SOURCE_CB_PTR); + __raw_writel(cfg->ch2_ptr2 + size + (size >> 2), + PRP_SOURCE_CR_PTR); + } + + __raw_writel(__raw_readl(PRP_CNTL) | PRP_CNTL_CH2B2, PRP_CNTL); + return 0; +} + +/*! + * @brief Build CSC table + * @param csc CSC table + * in csc[0]=index 0..3 : A.1 A.0 B.1 B.0 + * csc[1]=direction 0 : YUV2RGB 1 : RGB2YUV + * out csc[0..4] are coefficients c[9] is offset + * csc[0..8] are coefficients c[9] is offset + */ +void csc_tbl(short csc[10]) +{ + static const unsigned short _r2y[][9] = { + {0x4D, 0x4B, 0x3A, 0x57, 0x55, 0x40, 0x40, 0x6B, 0x29}, + {0x42, 0x41, 0x32, 0x4C, 0x4A, 0x38, 0x38, 0x5E, 0x24}, + {0x36, 0x5C, 0x25, 0x3B, 0x63, 0x40, 0x40, 0x74, 0x18}, + {0x2F, 0x4F, 0x20, 0x34, 0x57, 0x38, 0x38, 0x66, 0x15}, + }; + static const unsigned short _y2r[][5] = { + {0x80, 0xb4, 0x2c, 0x5b, 0x0e4}, + {0x95, 0xcc, 0x32, 0x68, 0x104}, + {0x80, 0xca, 0x18, 0x3c, 0x0ec}, + {0x95, 0xe5, 0x1b, 0x44, 0x1e0}, + }; + unsigned short *_csc; + int _csclen; + + csc[9] = csc[0] & 1; + _csclen = csc[0] & 3; + + if (csc[1]) { + _csc = (unsigned short *)_r2y[_csclen]; + _csclen = sizeof(_r2y[0]); + } else { + _csc = (unsigned short *)_y2r[_csclen]; + _csclen = sizeof(_y2r[0]); + memset(csc + 5, 0, sizeof(short) * 4); + } + memcpy(csc, _csc, _csclen); +} + +/*! + * @brief Setup PrP resize coefficient registers + * + * @param ch PrP channel number + * @param dir Direction, 0 - horizontal, 1 - vertical + * @param scale The pointer to scale_t structure + */ +static void prp_set_scaler(int ch, int dir, scale_t * scale) +{ + int i; + unsigned int coeff[2]; + unsigned int valid; + + for (coeff[0] = coeff[1] = valid = 0, i = 19; i >= 0; i--) { + int j; + + j = i > 9 ? 1 : 0; + coeff[j] = (coeff[j] << BC_COEF) | + (scale->tbl[i] & (SZ_COEF - 1)); + + if (i == 5 || i == 15) + coeff[j] <<= 1; + + valid = (valid << 1) | (scale->tbl[i] >> BC_COEF); + } + + valid |= (scale->len << 24) | ((2 - scale->algo) << 31); + + for (i = 0; i < 2; i++) + (*PRP_RSZ_COEFF)[1 - ch][dir].coeff[i] = coeff[i]; + + (*PRP_RSZ_COEFF)[1 - ch][dir].cntl = valid; +} + +/*! + * @brief Setup PrP registers relevant to input. + * @param cfg Pointer to PrP configuration parameter + * @param prp_cntl Holds the value for PrP control register + * @return Zero on success, others on failure + */ +static int prphw_input_cfg(emma_prp_cfg * cfg, unsigned long *prp_cntl) +{ + unsigned long mask; + + switch (cfg->in_pix) { + case PRP_PIXIN_YUV420: + *prp_cntl |= PRP_CNTL_IN_YUV420; + mask = 0x7; + break; + case PRP_PIXIN_YUYV: + case PRP_PIXIN_YVYU: + case PRP_PIXIN_UYVY: + case PRP_PIXIN_VYUY: + *prp_cntl |= PRP_CNTL_IN_YUV422; + mask = 0x1; + break; + case PRP_PIXIN_RGB565: + *prp_cntl |= PRP_CNTL_IN_RGB16; + mask = 0x1; + break; + case PRP_PIXIN_RGB888: + *prp_cntl |= PRP_CNTL_IN_RGB32; + mask = 0; + break; + default: + pr_debug("Unsupported input pix format 0x%08X\n", cfg->in_pix); + return -1; + } + + /* align the input image width */ + if (cfg->in_width & mask) { + pr_debug("in_width misaligned. in_width=%d\n", cfg->in_width); + return -1; + } + + if ((cfg->in_width < PRP_MIN_IN_WIDTH) + || (cfg->in_width > PRP_MAX_IN_WIDTH)) { + pr_debug("Unsupported input width %d\n", cfg->in_width); + return -1; + } + + cfg->in_height &= ~1; /* truncate to make even */ + + if ((cfg->in_height < PRP_MIN_IN_HEIGHT) + || (cfg->in_height > PRP_MAX_IN_HEIGHT)) { + pr_debug("Unsupported input height %d\n", cfg->in_height); + return -1; + } + + if (!(cfg->in_csi & PRP_CSI_EN)) + if (!cfg->in_line_stride) + cfg->in_line_stride = cfg->in_width; + + __raw_writel(cfg->in_pix, PRP_SRC_PIXEL_FORMAT_CNTL); + __raw_writel((cfg->in_width << 16) | cfg->in_height, + PRP_SOURCE_FRAME_SIZE); + __raw_writel((cfg->in_line_skip << 16) | cfg->in_line_stride, + PRP_SOURCE_LINE_STRIDE); + + if (!(cfg->in_csi & PRP_CSI_EN)) { + __raw_writel(cfg->in_ptr, PRP_SOURCE_Y_PTR); + if (cfg->in_pix == PRP_PIXIN_YUV420) { + unsigned int size; + + size = cfg->in_line_stride * cfg->in_height; + __raw_writel(cfg->in_ptr + size, PRP_SOURCE_CB_PTR); + __raw_writel(cfg->in_ptr + size + (size >> 2), + PRP_SOURCE_CR_PTR); + } + } + + /* always cropping */ + *prp_cntl |= PRP_CNTL_WINEN; + + /* color space conversion */ + if (!cfg->in_csc[1]) { + if (cfg->in_csc[0] > 3) { + pr_debug("in_csc invalid 0x%X\n", cfg->in_csc[0]); + return -1; + } + if ((cfg->in_pix == PRP_PIXIN_RGB565) + || (cfg->in_pix == PRP_PIXIN_RGB888)) + cfg->in_csc[1] = 1; + else + cfg->in_csc[0] = 0; + csc_tbl(cfg->in_csc); + } + + __raw_writel((cfg->in_csc[0] << 21) | (cfg->in_csc[1] << 11) + | cfg->in_csc[2], PRP_CSC_COEF_012); + __raw_writel((cfg->in_csc[3] << 21) | (cfg->in_csc[4] << 11) + | cfg->in_csc[5], PRP_CSC_COEF_345); + __raw_writel((cfg->in_csc[6] << 21) | (cfg->in_csc[7] << 11) + | cfg->in_csc[8] | (cfg->in_csc[9] << 31), + PRP_CSC_COEF_678); + + if (cfg->in_csi & PRP_CSI_EN) { + *prp_cntl |= PRP_CNTL_CSI; + + /* loop mode enable, ch1 ch2 together */ + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) + *prp_cntl |= (PRP_CNTL_CH1_LOOP | PRP_CNTL_CH2_LOOP); + } + + return 0; +} + +/*! + * @brief Setup PrP registers relevant to channel 2. + * @param cfg Pointer to PrP configuration parameter + * @param prp_cntl Holds the value for PrP control register + * @return Zero on success, others on failure + */ +static int prphw_ch2_cfg(emma_prp_cfg * cfg, unsigned long *prp_cntl) +{ + switch (cfg->ch2_pix) { + case PRP_PIX2_YUV420: + *prp_cntl |= PRP_CNTL_CH2_YUV420; + break; + case PRP_PIX2_YUV422: + *prp_cntl |= PRP_CNTL_CH2_YUV422; + break; + case PRP_PIX2_YUV444: + *prp_cntl |= PRP_CNTL_CH2_YUV444; + break; + case PRP_PIX2_UNUSED: + return 0; + default: + pr_debug("Unsupported channel 2 pix format 0x%08X\n", + cfg->ch2_pix); + return -1; + } + + if (cfg->ch2_pix == PRP_PIX2_YUV420) { + cfg->ch2_height &= ~1; /* ensure U/V presence */ + cfg->ch2_width &= ~7; /* ensure U/V word aligned */ + } else if (cfg->ch2_pix == PRP_PIX2_YUV422) { + cfg->ch2_width &= ~1; /* word aligned */ + } + + __raw_writel((cfg->ch2_width << 16) | cfg->ch2_height, + PRP_CH2_OUT_IMAGE_SIZE); + + if (cfg->ch2_pix == PRP_PIX2_YUV420) { + u32 size; + + /* Luminanance band start address */ + __raw_writel(cfg->ch2_ptr, PRP_DEST_Y_PTR); + + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) { + if (!cfg->ch2_ptr2) + __raw_writel(cfg->ch2_ptr, PRP_SOURCE_Y_PTR); + else + __raw_writel(cfg->ch2_ptr2, PRP_SOURCE_Y_PTR); + } + + /* Cb and Cr band start address */ + size = cfg->ch2_width * cfg->ch2_height; + __raw_writel(cfg->ch2_ptr + size, PRP_DEST_CB_PTR); + __raw_writel(cfg->ch2_ptr + size + (size >> 2), + PRP_DEST_CR_PTR); + + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) { + if (!cfg->ch2_ptr2) { + __raw_writel(cfg->ch2_ptr + size, + PRP_SOURCE_CB_PTR); + __raw_writel(cfg->ch2_ptr + size + (size >> 2), + PRP_SOURCE_CR_PTR); + } else { + __raw_writel(cfg->ch2_ptr2 + size, + PRP_SOURCE_CB_PTR); + __raw_writel(cfg->ch2_ptr2 + size + (size >> 2), + PRP_SOURCE_CR_PTR); + } + } + } else { /* Pixel interleaved YUV422 or YUV444 */ + __raw_writel(cfg->ch2_ptr, PRP_DEST_Y_PTR); + + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) { + if (!cfg->ch2_ptr2) + __raw_writel(cfg->ch2_ptr, PRP_SOURCE_Y_PTR); + else + __raw_writel(cfg->ch2_ptr2, PRP_SOURCE_Y_PTR); + } + } + *prp_cntl |= PRP_CNTL_CH2B1 | PRP_CNTL_CH2B2; + + return 0; +} + +/*! + * @brief Setup PrP registers relevant to channel 1. + * @param cfg Pointer to PrP configuration parameter + * @param prp_cntl Holds the value for PrP control register + * @return Zero on success, others on failure + */ +static int prphw_ch1_cfg(emma_prp_cfg * cfg, unsigned long *prp_cntl) +{ + int ch1_bpp = 0; + + switch (cfg->ch1_pix) { + case PRP_PIX1_RGB332: + *prp_cntl |= PRP_CNTL_CH1_RGB8; + ch1_bpp = 1; + break; + case PRP_PIX1_RGB565: + *prp_cntl |= PRP_CNTL_CH1_RGB16; + ch1_bpp = 2; + break; + case PRP_PIX1_RGB888: + *prp_cntl |= PRP_CNTL_CH1_RGB32; + ch1_bpp = 4; + break; + case PRP_PIX1_YUYV: + case PRP_PIX1_YVYU: + case PRP_PIX1_UYVY: + case PRP_PIX1_VYUY: + *prp_cntl |= PRP_CNTL_CH1_YUV422; + ch1_bpp = 2; + break; + case PRP_PIX1_UNUSED: + return 0; + default: + pr_debug("Unsupported channel 1 pix format 0x%08X\n", + cfg->ch1_pix); + return -1; + } + + /* parallel or cascade resize */ + if (cfg->ch1_scale.algo & PRP_ALGO_BYPASS) + *prp_cntl |= PRP_CNTL_UNCHAIN; + + /* word align */ + if (ch1_bpp == 2) + cfg->ch1_width &= ~1; + else if (ch1_bpp == 1) + cfg->ch1_width &= ~3; + + if (!cfg->ch1_stride) + cfg->ch1_stride = cfg->ch1_width; + + __raw_writel(cfg->ch1_pix, PRP_CH1_PIXEL_FORMAT_CNTL); + __raw_writel((cfg->ch1_width << 16) | cfg->ch1_height, + PRP_CH1_OUT_IMAGE_SIZE); + __raw_writel(cfg->ch1_stride * ch1_bpp, PRP_CH1_LINE_STRIDE); + __raw_writel(cfg->ch1_ptr, PRP_DEST_RGB1_PTR); + + /* double buffer for loop mode */ + if ((cfg->in_csi & PRP_CSI_LOOP) == PRP_CSI_LOOP) { + if (cfg->ch1_ptr2) + __raw_writel(cfg->ch1_ptr2, PRP_DEST_RGB2_PTR); + else + __raw_writel(cfg->ch1_ptr, PRP_DEST_RGB2_PTR); + } + + return 0; +} + +/*! + * @brief Setup PrP registers. + * @param cfg Pointer to PrP configuration parameter + * @return Zero on success, others on failure + */ +int prphw_cfg(emma_prp_cfg * cfg) +{ + unsigned long prp_cntl = 0; + unsigned long val; + + /* input pixel format checking */ + if (prphw_input_cfg(cfg, &prp_cntl)) + return -1; + + if (prphw_ch2_cfg(cfg, &prp_cntl)) + return -1; + + if (prphw_ch1_cfg(cfg, &prp_cntl)) + return -1; + + /* register setting */ + __raw_writel(prp_cntl, PRP_CNTL); + + /* interrupt configuration */ + val = PRP_INTRCNTL_RDERR | PRP_INTRCNTL_LBOVF; + if (cfg->ch1_pix != PRP_PIX1_UNUSED) + val |= PRP_INTRCNTL_CH1FC | PRP_INTRCNTL_CH1WERR; + if (cfg->ch2_pix != PRP_PIX2_UNUSED) + val |= + PRP_INTRCNTL_CH2FC | PRP_INTRCNTL_CH2WERR | + PRP_INTRCNTL_CH2OVF; + __raw_writel(val, PRP_INTRCNTL); + + prp_set_scaler(1, 0, &cfg->scale[0]); /* Channel 1 width */ + prp_set_scaler(1, 1, &cfg->scale[1]); /* Channel 1 height */ + prp_set_scaler(0, 0, &cfg->scale[2]); /* Channel 2 width */ + prp_set_scaler(0, 1, &cfg->scale[3]); /* Channel 2 height */ + + return 0; +} + +/*! + * @brief Check PrP interrupt status. + * @return PrP interrupt status + */ +int prphw_isr(void) +{ + int status; + + status = __raw_readl(PRP_INTRSTATUS) & 0x1FF; + + if (status & (PRP_INTRSTAT_RDERR | PRP_INTRSTAT_CH1WERR | + PRP_INTRSTAT_CH2WERR)) + pr_debug("isr bus error. status= 0x%08X\n", status); + else if (status & PRP_INTRSTAT_CH2OVF) + pr_debug("isr ch 2 buffer overflow. status= 0x%08X\n", status); + else if (status & PRP_INTRSTAT_LBOVF) + pr_debug("isr line buffer overflow. status= 0x%08X\n", status); + + /* silicon bug?? enable bit does not self clear? */ + if (!(__raw_readl(PRP_CNTL) & PRP_CNTL_CH1_LOOP)) + __raw_writel(__raw_readl(PRP_CNTL) & (~PRP_CNTL_CH1EN), + PRP_CNTL); + if (!(__raw_readl(PRP_CNTL) & PRP_CNTL_CH2_LOOP)) + __raw_writel(__raw_readl(PRP_CNTL) & (~PRP_CNTL_CH2EN), + PRP_CNTL); + + __raw_writel(status, PRP_INTRSTATUS); /* clr irq */ + + return status; +} + +static struct clk *emma_clk; + +/*! + * @brief PrP module clock enable + */ +void prphw_init(void) +{ + emma_clk = clk_get(NULL, "emma_clk"); + clk_enable(emma_clk); +} + +/*! + * @brief PrP module clock disable + */ +void prphw_exit(void) +{ + clk_disable(emma_clk); + clk_put(emma_clk); +} |